adds sessions controller, view, assets, helpers, routes, and specs
adds token, sign-in, sign-out, sessions functionality and updates/adds specs
adds token migration, and sign_in action
generates model, controller, specs, migration, assets, helpers, and views for playlists
generates model, controller, specs, migration, assets, helpers, and views for songs
adds/edits routes for songs and playlists
adds center styling for h3 tags
updates schema for songs, playlists, and playlist-songs
generates model, controller, specs, migration, assets, helpers, and views for playlist_songs
adds carrierwave gem and its corresponding song uploader
updates playlist validations
updates header menu links
updates user validations to destroy playlists and songs on user deletion
updates user and playlist factories and adds user/playlist association specs and playlist page specs
adds playlist catalog to user show
bullshit git merge conflict, not sure what happened