Version 2.0.0

Todo:
- [x] Reactify all the things!
- [x] Move to .NET 4.5
- [x] AnyCPU
- [x] Playback without playlists
- [x] Automatic library updates
- [ ] Fuck ClickOnce and move to a better installation/update system (I'm looking at you, Shimmer)
- [ ] German translation?
- [ ] AAC support?
- [x] High quality YouTube
- [x] YouTube video player
- [x] YouTube download
- [ ] YouTube login to show favorites?
- [ ] Fix unit tests
- [x] Enable YouTube streaming by default
- [ ] Remote control via an Android app (later)