Add removing playlist by id
Add removing track from playlist (need correct)
Modified removing playlists (need fixed)
Fixed bug with removing tracks
Merge branch 'remove-tracks' into develop

Conflicts:
	Azimuth/ApiControllers/PlaylistsController.cs
	Azimuth/Services/PlaylistService.cs
Merge branch 'develop' of github.com:confa/Azimuth into develop

Conflicts:
	Azimuth/ApiControllers/PlaylistsController.cs
Merged removing tracks