Make using the color change tool easier: now changes are tracked live
Merge pull request #183 from stefanriemens/LiveColorEdit

Scene Editor: color change tool changes live tracking
Added fixtures: Stairville PAR64 CX-3 RGBW, Stairville TRI LED Bundle Complete (thanks to Lars Kildholt)
Engine: Fixed RGB Matrix crash

Fixed scene and RGB Matrix tests.
Improved ADJ Mega Tri Bar fixture