Updated vlcj and fixed play-controls.js bug.
VlcPlayer refactoring.
Playlist edit and remove-buttons are now hidden if user is not admin.
UI-fixes and other little refactorings.
1. Renamed PlaylistResource.delete to removeTrackFromPlaylist so it is less ambigious.
2. Fixed index page playlist item removal
3. Added acceptance tests for index page playlist item removal and playlist page playlist item removel.
4. Added acceptance test for playlist selection.