Add bundler support because screw sudo gem install

Gemfile

@@ -0,0 +1,3 @@
+source "http://rubygems.org"
+
+gem 'maruku'

Gemfile.lock

@@ -0,0 +1,12 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    maruku (0.6.1)
+      syntax (>= 1.0.0)
+    syntax (1.0.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  maruku

README.markdown

@@ -1,8 +1,8 @@
 Learn.GitHub.com
 ================
 
-This is the code and data behind [learn.github.com](http://learn.github.com). 
-The page content lives in the pages/ directory and is compiled into the HTML 
+This is the code and data behind [learn.github.com](http://learn.github.com).
+The page content lives in the pages/ directory and is compiled into the HTML
 output in p/. Normally, generated files like these wouldn't be checked into
 source control, but it's required for the
 [GitHub Pages](http://pages.github.com/) hosting.
@@ -15,9 +15,10 @@ changes.
 Dependencies, Getting Started
 -----------------------------
 
-Compiling the site requires maruku, which can be installed with:
+Compiling the site requires maruku, which can be installed with
+[Bundler](http://gembundler.com/):
 
-    sudo gem install maruku
+    bundle install
 
 Once you've done that, just run rake to compile the site:
 
@@ -28,10 +29,11 @@ Contributing
 -----------------------------
 
 To contribute to the learn.github site, you can fork the repository,
-push your changes into it and send a pull request.  
+push your changes into it and send a pull request.
 
 If you want to run the site on GitHub pages for testing, you can push your
-changes into your fork of the repository and it will render at the usual convention of
+changes into your fork of the repository and it will render at the usual
+convention of
 
   http://YOURUSERNAME.github.com/THEREPONAME