small refactor
add saving to db
add small changes in UI
add import genres from vk
add migration for Lyrics + fix problem with genres
Merge branch 'saving-tracks-to-db' into develop

Conflicts:
	Azimuth.Shared/Azimuth.Shared.csproj
	Azimuth/ApiControllers/UserTracksController.cs
	Azimuth/DataProviders/Concrete/VkApi.cs
	Azimuth/Services/IUserTracksService.cs
	Azimuth/Services/UserTracksService.cs