Remove unused method
Create helper method for link_to with i.icon-* element
Change cache updating route from PUT to POST to follow github spec
Change the name of helper method and add examplefor it
Remove public assets from repository

I have precompiled assets for Heroku,
but ideally I might want Heroku to compile by oneself.
Remove entries index cache in post receive hook
Update or Create should not be invoked in GET request
Put decorators as top-level classes for app
Change values to static value in test env
Add full examples for EntryDecorator
Add examples for User to increase the test coverage