updated API DOCS
added remove endpoints for queue and playlist
implemented removeSongFromQueue/Playlist in dbHelpers
Tests running successfully
Merge pull request #30 from alexmckenley/dev

Implemented backend playlists and queues
Refactored searchResults into SearchService. Added dependencies for SearchService. Added player.play(song) in search.html on click.
Added TODO issues comments
Merge branch 'searchRefactor' into dev