diff --git a/Cargo.toml b/Cargo.toml
index dfee0600..8c588564 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mdbook"
-version = "0.0.3"
+version = "0.0.4"
 authors = ["Mathieu David <mathieudavid@mathieudavid.org>"]
 description = "create books from markdown files (like Gitbook)"
 documentation = "http://azerupi.github.io/mdBook/index.html"
@@ -15,11 +15,11 @@ exclude = [
 ]
 
 [dependencies]
-clap = "*"
-handlebars = "*"
-rustc-serialize = "*"
-pulldown-cmark = "*"
-crossbeam = "^0.1.5"
+clap = "~1.5.3"
+handlebars = "~0.12.0"
+rustc-serialize = "~0.3.16"
+pulldown-cmark = "~0.0.3"
+
 
 # Watch feature
 [dependencies.notify]
@@ -30,9 +30,13 @@ optional = true
 time = "^0.1.33"
 optional = true
 
+[dependencies.crossbeam]
+time = "^0.2.0"
+optional = true
+
 # Tests
 [dev-dependencies]
-tempdir = "*"
+tempdir = "~0.3.4"
 
 
 [features]
@@ -40,7 +44,7 @@ default = ["output", "watch"]
 debug = []
 output = []
 regenerate-css = []
-watch = ["notify", "time"]
+watch = ["notify", "time", "crossbeam"]
 
 [[bin]]
 doc = false
diff --git a/README.md b/README.md
index 67963d95..ed5880e7 100644
--- a/README.md
+++ b/README.md
@@ -13,14 +13,10 @@ To have an idea of what a rendered book looks like,take a look at the [**Documen
 ## Installation
 
 ```
-git clone --depth=1 https://github.com/azerupi/mdBook.git
-cd mdBook
-cargo build --release
+cargo install mdbook
 ```
 
-The executable `mdbook` will be in the `./target/release` folder, this should be added to the path.
-
-If you want to regenerate the css (stylesheet), make sure that you installed `stylus` and `nib` from `npm` because it is used to compile the stylesheets
+If you want to regenerate the css (stylesheet), clone the git repo locally and make sure that you installed `stylus` and `nib` from `npm` because it is used to compile the stylesheets
 
 Install [node.js](https://nodejs.org/en/)
 
diff --git a/src/bin/mdbook.rs b/src/bin/mdbook.rs
index 71cbf1d9..50b9a2e2 100644
--- a/src/bin/mdbook.rs
+++ b/src/bin/mdbook.rs
@@ -1,3 +1,4 @@
+#[macro_use]
 extern crate mdbook;
 #[macro_use]
 extern crate clap;
@@ -49,6 +50,8 @@ fn main() {
                     .subcommand(SubCommand::with_name("watch")
                         .about("Watch the files for changes")
                         .arg_from_usage("[dir] 'A directory for your book{n}(Defaults to Current Directory when ommitted)'"))
+                    .subcommand(SubCommand::with_name("test")
+                        .about("Test that code samples compile"))
                     .get_matches();
 
     // Check which subcomamnd the user ran...
@@ -57,6 +60,7 @@ fn main() {
         ("build", Some(sub_matches)) => build(sub_matches),
         #[cfg(feature = "watch")]
         ("watch", Some(sub_matches)) => watch(sub_matches),
+        ("test", Some(sub_matches)) => test(sub_matches),
         (_, _)                       => unreachable!()
     };
 
@@ -142,8 +146,17 @@ fn watch(args: &ArgMatches) -> Result<(), Box<Error>> {
      match w {
          Ok(mut watcher) => {
 
-             watcher.watch(book.get_src()).unwrap();
-             watcher.watch(book_dir.join("book.json")).unwrap();
+             // Add the source directory to the watcher
+             if let Err(e) = watcher.watch(book.get_src()) {
+                 println!("Error while watching {:?}:\n    {:?}", book.get_src(), e);
+                 ::std::process::exit(0);
+             };
+
+             // Add the book.json file to the watcher if it exists, because it's not
+             // located in the source directory
+             if let Err(_) = watcher.watch(book_dir.join("book.json")) {
+                 // do nothing if book.json is not found
+             }
 
              let previous_time = time::get_time().sec;
 
@@ -184,11 +197,22 @@ fn watch(args: &ArgMatches) -> Result<(), Box<Error>> {
          }
      }
 
+     Ok(())
+ }
+
+
+
+fn test(args: &ArgMatches) -> Result<(), Box<Error>> {
+    let book_dir = get_book_dir(args);
+    let mut book = MDBook::new(&book_dir).read_config();
+
+    try!(book.test());
+
     Ok(())
 }
 
 
-// Helper function that returns the right path if either a relative or absolute path is passed
+
 fn get_book_dir(args: &ArgMatches) -> PathBuf {
     if let Some(dir) = args.value_of("dir") {
         // Check if path is relative from current dir, or absolute...
diff --git a/src/book/mdbook.rs b/src/book/mdbook.rs
index e2ee2581..02430414 100644
--- a/src/book/mdbook.rs
+++ b/src/book/mdbook.rs
@@ -1,7 +1,10 @@
 use std::path::{Path, PathBuf};
 use std::fs::{self, File};
-use std::io::Write;
 use std::error::Error;
+use std::io;
+use std::io::Write;
+use std::io::ErrorKind;
+use std::process::Command;
 
 use {BookConfig, BookItem, theme, parse, utils};
 use book::BookItems;
@@ -257,6 +260,39 @@ impl MDBook {
         self
     }
 
+    pub fn test(&mut self) -> Result<(), Box<Error>> {
+        // read in the chapters
+        try!(self.parse_summary());
+        for item in self.iter() {
+
+            match *item {
+                BookItem::Chapter(_, ref ch) => {
+                    if ch.path != PathBuf::new() {
+
+                        let path = self.get_src().join(&ch.path);
+
+                        println!("[*]: Testing file: {:?}", path);
+
+                        let output_result = Command::new("rustdoc")
+                            .arg(&path)
+                            .arg("--test")
+                            .output();
+                        let output = try!(output_result);
+
+                        if !output.status.success() {
+                            return Err(Box::new(io::Error::new(ErrorKind::Other, format!(
+                                            "{}\n{}",
+                                            String::from_utf8_lossy(&output.stdout),
+                                            String::from_utf8_lossy(&output.stderr)))) as Box<Error>);
+                        }
+                    }
+                }
+                _ => {}
+            }
+        }
+        Ok(())
+    }
+
     pub fn set_dest(mut self, dest: &Path) -> Self {
 
         // Handle absolute and relative paths
diff --git a/src/renderer/html_handlebars/hbs_renderer.rs b/src/renderer/html_handlebars/hbs_renderer.rs
index 6055b27f..f45079cb 100644
--- a/src/renderer/html_handlebars/hbs_renderer.rs
+++ b/src/renderer/html_handlebars/hbs_renderer.rs
@@ -114,7 +114,7 @@ impl Renderer for HtmlHandlebars {
 
                             // This could cause a problem when someone displays code containing <base href=...>
                             // on the front page, however this case should be very very rare...
-                            content = content.lines().filter(|line| !line.contains("<base href=")).collect();
+                            content = content.lines().filter(|line| !line.contains("<base href=")).collect::<Vec<&str>>().join("\n");
 
                             try!(index_file.write_all(content.as_bytes()));
 
diff --git a/src/renderer/html_handlebars/helpers/navigation.rs b/src/renderer/html_handlebars/helpers/navigation.rs
index a693f9ca..8fa2f658 100644
--- a/src/renderer/html_handlebars/helpers/navigation.rs
+++ b/src/renderer/html_handlebars/helpers/navigation.rs
@@ -27,7 +27,7 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
     // Decode json format
     let decoded: Vec<BTreeMap<String, String>> = match json::decode(&chapters.to_string()) {
         Ok(data) => data,
-        Err(_) => return Err(RenderError{ desc: "Could not decode the JSON data"}),
+        Err(_) => return Err(RenderError{ desc: "Could not decode the JSON data".to_owned()}),
     };
     let mut previous: Option<BTreeMap<String, String>> = None;
 
@@ -55,7 +55,7 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
                             },
                             None => {
                                 debug!("[*]: No title found for chapter");
-                                return Err(RenderError{ desc: "No title found for chapter in JSON data" })
+                                return Err(RenderError{ desc: "No title found for chapter in JSON data".to_owned() })
                             }
                         };
 
@@ -68,10 +68,10 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
 
                                 match path.to_str() {
                                     Some(p) => { previous_chapter.insert("link".to_owned(), p.to_json()); },
-                                    None => return Err(RenderError{ desc: "Link could not be converted to str" })
+                                    None => return Err(RenderError{ desc: "Link could not be converted to str".to_owned() })
                                 }
                             },
-                            None => return Err(RenderError{ desc: "No path found for chapter in JSON data" })
+                            None => return Err(RenderError{ desc: "No path found for chapter in JSON data".to_owned() })
                         }
 
                         debug!("[*]: Inject in context");
@@ -84,7 +84,7 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
                             Some(t) => {
                                 try!(t.render(&updated_context, r, rc));
                             },
-                            None => return Err(RenderError{ desc: "Error with the handlebars template" })
+                            None => return Err(RenderError{ desc: "Error with the handlebars template".to_owned() })
                         }
 
                     }
@@ -124,7 +124,7 @@ pub fn next(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext) ->
     // Decode json format
     let decoded: Vec<BTreeMap<String, String>> = match json::decode(&chapters.to_string()) {
         Ok(data) => data,
-        Err(_) => return Err(RenderError{ desc: "Could not decode the JSON data"}),
+        Err(_) => return Err(RenderError{ desc: "Could not decode the JSON data".to_owned() }),
     };
     let mut previous: Option<BTreeMap<String, String>> = None;
 
@@ -140,7 +140,7 @@ pub fn next(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext) ->
 
                     let previous_path = match previous.get("path") {
                         Some(p) => p,
-                        None => return Err(RenderError{ desc: "No path found for chapter in JSON data"})
+                        None => return Err(RenderError{ desc: "No path found for chapter in JSON data".to_owned() })
                     };
 
                     if previous_path == &current {
@@ -155,7 +155,7 @@ pub fn next(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext) ->
                                 debug!("[*]: Inserting title: {}", n);
                                 next_chapter.insert("title".to_owned(), n.to_json());
                             }
-                            None => return Err(RenderError{ desc: "No title found for chapter in JSON data"})
+                            None => return Err(RenderError{ desc: "No title found for chapter in JSON data".to_owned() })
                         }
 
 
@@ -164,7 +164,7 @@ pub fn next(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext) ->
 
                         match link.to_str() {
                             Some(l) => { next_chapter.insert("link".to_owned(), l.to_json()); },
-                            None => return Err(RenderError{ desc: "Link could not converted to str"})
+                            None => return Err(RenderError{ desc: "Link could not converted to str".to_owned() })
                         }
 
                         debug!("[*]: Inject in context");
@@ -178,7 +178,7 @@ pub fn next(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext) ->
                             Some(t) => {
                                 try!(t.render(&updated_context, r, rc));
                             },
-                            None => return Err(RenderError{ desc: "Error with the handlebars template" })
+                            None => return Err(RenderError{ desc: "Error with the handlebars template".to_owned() })
                         }
 
                         break
diff --git a/src/theme/book.css b/src/theme/book.css
index 102b1762..108e39e0 100644
--- a/src/theme/book.css
+++ b/src/theme/book.css
@@ -9,6 +9,9 @@ body {
 .right {
   float: right;
 }
+.hidden {
+  display: none;
+}
 h2,
 h3 {
   margin-top: 2.5em;
@@ -222,7 +225,7 @@ h3 {
   left: 0;
 }
 .next {
-  right: 0;
+  right: 15px;
 }
 .theme-popup {
   position: fixed;
@@ -270,9 +273,30 @@ h3 {
   }
 }
 .light {
+/* Inline code */
   color: #333;
   background-color: #fff;
 }
+.light :not(pre) > .hljs {
+  display: inline-block;
+  vertical-align: middle;
+  padding: 0.1em 0.3em;
+  -webkit-border-radius: 3px;
+  border-radius: 3px;
+}
+.light pre {
+  position: relative;
+}
+.light pre > i {
+  position: absolute;
+  right: 5px;
+  top: 5px;
+  color: #364149;
+  cursor: pointer;
+}
+.light pre > i :hover {
+  color: #008cff;
+}
 .light .sidebar {
   background-color: #fafafa;
   color: #364149;
@@ -307,7 +331,7 @@ h3 {
 .light .mobile-nav-chapters {
   background-color: #fafafa;
 }
-.light .content a {
+.light .content a:link {
   color: #4183c4;
 }
 .light .theme-popup {
@@ -318,9 +342,30 @@ h3 {
   background-color: #e6e6e6;
 }
 .coal {
+/* Inline code */
   color: #98a3ad;
   background-color: #141617;
 }
+.coal :not(pre) > .hljs {
+  display: inline-block;
+  vertical-align: middle;
+  padding: 0.1em 0.3em;
+  -webkit-border-radius: 3px;
+  border-radius: 3px;
+}
+.coal pre {
+  position: relative;
+}
+.coal pre > i {
+  position: absolute;
+  right: 5px;
+  top: 5px;
+  color: #a1adb8;
+  cursor: pointer;
+}
+.coal pre > i :hover {
+  color: #3473ad;
+}
 .coal .sidebar {
   background-color: #292c2f;
   color: #a1adb8;
@@ -355,7 +400,7 @@ h3 {
 .coal .mobile-nav-chapters {
   background-color: #292c2f;
 }
-.coal .content a {
+.coal .content a:link {
   color: #2b79a2;
 }
 .coal .theme-popup {
@@ -366,9 +411,30 @@ h3 {
   background-color: #1f2124;
 }
 .navy {
+/* Inline code */
   color: #bcbdd0;
   background-color: #161923;
 }
+.navy :not(pre) > .hljs {
+  display: inline-block;
+  vertical-align: middle;
+  padding: 0.1em 0.3em;
+  -webkit-border-radius: 3px;
+  border-radius: 3px;
+}
+.navy pre {
+  position: relative;
+}
+.navy pre > i {
+  position: absolute;
+  right: 5px;
+  top: 5px;
+  color: #c8c9db;
+  cursor: pointer;
+}
+.navy pre > i :hover {
+  color: #2b79a2;
+}
 .navy .sidebar {
   background-color: #282d3f;
   color: #c8c9db;
@@ -403,7 +469,7 @@ h3 {
 .navy .mobile-nav-chapters {
   background-color: #282d3f;
 }
-.navy .content a {
+.navy .content a:link {
   color: #2b79a2;
 }
 .navy .theme-popup {
@@ -414,9 +480,30 @@ h3 {
   background-color: #282e40;
 }
 .rust {
+/* Inline code */
   color: #262625;
   background-color: #e1e1db;
 }
+.rust :not(pre) > .hljs {
+  display: inline-block;
+  vertical-align: middle;
+  padding: 0.1em 0.3em;
+  -webkit-border-radius: 3px;
+  border-radius: 3px;
+}
+.rust pre {
+  position: relative;
+}
+.rust pre > i {
+  position: absolute;
+  right: 5px;
+  top: 5px;
+  color: #c8c9db;
+  cursor: pointer;
+}
+.rust pre > i :hover {
+  color: #e69f67;
+}
 .rust .sidebar {
   background-color: #3b2e2a;
   color: #c8c9db;
@@ -451,7 +538,7 @@ h3 {
 .rust .mobile-nav-chapters {
   background-color: #3b2e2a;
 }
-.rust .content a {
+.rust .content a:link {
   color: #2b79a2;
 }
 .rust .theme-popup {
diff --git a/src/theme/book.js b/src/theme/book.js
index 0754fee7..58d8eed9 100644
--- a/src/theme/book.js
+++ b/src/theme/book.js
@@ -8,7 +8,7 @@ $( document ).ready(function() {
 
     // Set theme
     var theme = localStorage.getItem('theme');
-    if (theme == null) { theme = 'light'; }
+    if (theme === null) { theme = 'light'; }
 
     set_theme(theme);
 
@@ -28,6 +28,15 @@ $( document ).ready(function() {
     var html = $("html");
     var sidebar = $("#sidebar");
     var page_wrapper = $("#page-wrapper");
+    var content = $("#content");
+
+
+    // Add anchors for all content headers
+    content.find("h1, h2, h3, h4, h5").wrap(function(){
+        var wrapper = $("<a>");
+        wrapper.attr("name", $(this).text());
+        return wrapper;
+    });
 
 
     // Toggle sidebar
@@ -50,6 +59,13 @@ $( document ).ready(function() {
     });
 
 
+    // Scroll sidebar to current active section
+    var activeSection = sidebar.find(".active");
+    if(activeSection.length) {
+        sidebar.scrollTop(activeSection.offset().top);
+    }
+
+
     // Print button
     $("#print-button").click(function(){
         var printWindow = window.open("print.html");
@@ -77,7 +93,7 @@ $( document ).ready(function() {
             $('.theme').click(function(){
                 var theme = $(this).attr('id');
 
-                set_theme(theme)
+                set_theme(theme);
             });
         }
 
@@ -96,4 +112,54 @@ $( document ).ready(function() {
 
         $('body').removeClass().addClass(theme);
     }
+
+
+    // Hide Rust code lines prepended with a specific character
+    var hiding_character = "#";
+
+    $("code.language-rust").each(function(i, block){
+
+        // hide lines
+        var lines = $(this).html().split("\n");
+        var first_non_hidden_line = false;
+        var lines_hidden = false;
+
+        for(var n = 0; n < lines.length; n++){
+            if($.trim(lines[n])[0] == hiding_character){
+                if(first_non_hidden_line){
+                    lines[n] = "<span class=\"hidden\">" + "\n" + lines[n].substr(1) + "</span>";
+                }
+                else {
+                    lines[n] = "<span class=\"hidden\">" + lines[n].substr(1) + "\n"  +  "</span>";
+                }
+                lines_hidden = true;
+            }
+            else if(first_non_hidden_line) {
+                lines[n] = "\n" + lines[n];
+            }
+            else {
+                first_non_hidden_line = true;
+            }
+        }
+        $(this).html(lines.join(""));
+
+        // If no lines were hidden, return
+        if(!lines_hidden) { return; }
+
+        // add expand button
+        $(this).parent().prepend("<i class=\"fa fa-expand\"></i>");
+
+        $(this).parent().find("i").click(function(e){
+            if( $(this).hasClass("fa-expand") ) {
+                $(this).removeClass("fa-expand").addClass("fa-compress");
+                $(this).parent().find("span.hidden").removeClass("hidden").addClass("unhidden");
+            }
+            else {
+                $(this).removeClass("fa-compress").addClass("fa-expand");
+                $(this).parent().find("span.unhidden").removeClass("unhidden").addClass("hidden");
+            }
+        });
+    });
+
+
 });
diff --git a/src/theme/highlight.css b/src/theme/highlight.css
index 616dba0d..61681a2b 100644
--- a/src/theme/highlight.css
+++ b/src/theme/highlight.css
@@ -10,14 +10,6 @@
   -webkit-text-size-adjust: none;
 }
 
-/* Inline code */
-:not(pre) > .hljs {
-    display: inline-block;
-    vertical-align: middle;
-    padding: 0.1em 0.3em;
-    border-radius: 3px;
-}
-
 
 /* Atelier-Dune Comment */
 .hljs-comment {
diff --git a/src/theme/stylus/general.styl b/src/theme/stylus/general.styl
index 13f616f6..e798e8e0 100644
--- a/src/theme/stylus/general.styl
+++ b/src/theme/stylus/general.styl
@@ -11,4 +11,8 @@ html, body {
     float: right
 }
 
+.hidden {
+    display: none;
+}
+
 h2, h3 { margin-top: 2.5em }
diff --git a/src/theme/stylus/nav-icons.styl b/src/theme/stylus/nav-icons.styl
index 2ffb93f7..211db682 100644
--- a/src/theme/stylus/nav-icons.styl
+++ b/src/theme/stylus/nav-icons.styl
@@ -20,4 +20,4 @@
 .mobile-nav-chapters { display: none }
 .nav-chapters:hover { text-decoration: none }
 .previous { left: 0 }
-.next { right: 0 }
+.next { right: 15px }
diff --git a/src/theme/stylus/themes/base.styl b/src/theme/stylus/themes/base.styl
index fdbcc9dc..0a87b587 100644
--- a/src/theme/stylus/themes/base.styl
+++ b/src/theme/stylus/themes/base.styl
@@ -1,4 +1,28 @@
 .{unquote($theme-name)} {
+    /* Inline code */
+    :not(pre) > .hljs {
+        display: inline-block;
+        vertical-align: middle;
+        padding: 0.1em 0.3em;
+        border-radius: 3px;
+    }
+
+    pre {
+        position: relative;
+    }
+    pre > i {
+        position: absolute;
+        right: 5px;
+        top: 5px;
+
+        color: $sidebar-fg;
+        cursor: pointer;
+
+        :hover {
+            color: $sidebar-active;
+        }
+    }
+
     color: $fg
     background-color: $bg
 
@@ -43,7 +67,7 @@
         background-color: $sidebar-bg
     }
 
-    .content a {
+    .content a:link {
         color: $links
     }