New Features
- ArtistsVC: adding search bar
- AlbumsVC: adding search bar
- SongVC: adding search bar
- PlaylistsVC: adding search bar
- SearchVC: playlists are searchable too
- iPad: Optimize views for bigger screens
- SettingsView: display app version, build number, server url, username and backend API
- Navigate from songs to their artist and album
- SongCell: The action performed on a SongCell tab is configurable
- LoginVC: Detailed error messages at login failure
Bug fixes
- SyncView: Fix progress bar length
- LoginView: login form has correct background color
- PlayerView: fix compile warning with PopupPlayerVC