Updated cmake to compile against xnvctrl
Ported Data Engine to NVCtrl (no bumblebee nor optimus yet) (memory clock is half the real value for some reason)
Replace every command calls with c++ implementation (untested)
Added QtCreator conf to .gitignore
Updated pkgbuild to build this specific branch
Fix gpu status detection with bumblebee
Improved GPU off handling
Fix source request handling if failed to grab value (ex cg is off with bumblebee)
DataEngine refactored
Merge branch 'master' into nvctrl
Merge branch 'nvctrl' into master