Using HighLevel.GameEngine2D
added fps counter
Added fps counter
new update texture
add realfps counter
Threaded Emulator

Update method of emulator runs in separate thread (calls emulateCycle()
of chip8).
Small fixies...

... to emulator scene and thread in emulator.
Keyboard is no longer rendered.
initial work on configuration

and UI and GameEngine Scenes together
moving around from scene to scene
Proper scene navigation
Loading key mapping from configuration
Merge branch 'master' into game-engine
Brix config