Set up karma unit tests with gulp
Implement currentPlaylistService, queueService, and playlistService

Add jsdoc comments in providersService

Implement playlistService

qupdate queueService

Remove stray space from index.html

Add currentPlaylistService

Added utility functions to queueService

update playlistService
remove chrome-launcher (unused node package)
Merge pull request #335 from malucky/gulp-tests

Set up karma unit tests with gulp
Update jsDoc notation and fix bug in eventService
Merge pull request #336 from alexmckenley/queuePlaylist

Implement currentPlaylistService, queueService, and playlistService