Namespace (#1328)

* CSS to SCSS

* Use sprockets

* Use Sprockets helpers

* Fix gollum.editor.js error when changing language

* Add keybinding files required by ace and some ace ext files that are required or might be useful.

* Move app paths to /gollum namespace, add route helpers for view templates

* Use path helper for links in page view

* Use path helper methods in javascript assets

* Refactored sprockets helpers for mustache

* Remove debugging

test/test_latest_changes_view.rb

@@ -17,7 +17,7 @@ context "Precious::Views::LatestChanges" do
   end
 
   test "displays_latest_changes" do
-    get('/latest_changes')
+    get('/gollum/latest_changes')
     body = last_response.body
 
     assert body.include?('<span class="username">Charles Pence</span>'), "/latest_changes should include the Author Charles Pence"