merged v1.5.0 from visor-android (https://play.google.com/store/apps/details?id=de.visorapp.visor)
- now using a native module to calculate YUV -> RGB bytes
- do not a scale a bitmap by creating a new one, just use a Matrix and Canvas.
- added some sounds and animations
changed app-id (to have both apps installed at the same time)
changed app name to "Visor OS"
updated gradle, android plugin (using android studio canary)
still many things to do, especially refactoring!
upcoming: hide control buttons with a gesture and may be a digital zoom
