devise install generation & added default_url_options in environment files
added notice/alert in layout for devise & generated site controller
generated devise views
generated devise User model
removed site controller - no longer needed since devise controller takes over
generated course controller
generated section controller
generated content controller
generated comments controller
added authenticate before filter in all 4 controllers
removed spec
removed .js.coffee files
removed css.scss files
Merge pull request #6 from jeromeall/user_auth_devise

User auth devise install/setup + generated controllers for courses,sections,contents,comments