Merge pull request #14 from girb0t/sessions

Sessions
User can now create comments on songs
-Ajax implementation to come
Delete song form partial
Merge branch 'development' of https://github.com/girb0t/diggit into show_song_view
Merge pull request #16 from girb0t/show_song_view

Development
get slidedown working
fix display issue for iframe on songs#show