docco.css path has been moved

For some reason, the '/linear' path was added and the old file is no longer accessible.  Also, github.io to not have the 302.

lib/rocco.rb

@@ -90,7 +90,7 @@ def initialize(filename, sources=[], options={})
       :language      => 'ruby',
       :comment_chars => '#',
       :template_file => nil,
-      :stylesheet    => 'http://jashkenas.github.com/docco/resources/docco.css'
+      :stylesheet    => 'http://jashkenas.github.io/docco/resources/linear/docco.css'
     }.merge(options)
 
     # If we detect a language