fixed merge bug (edge) in started status
initialization of nr of acquired frames
Merge remote-tracking branch 'remotes/github/master'
Add camera refcounting in interface (python)
hw ROI - check symmetry
- exception if not valid (no fixing values)
Merge remote-tracking branch 'remotes/github/master'
Merge remote branch 'mainstream/master'

* mainstream/master:
  hw ROI - check symmetry - exception if not valid (no fixing values)
  Add camera refcounting in interface (python)
  fixed merge bug (edge) in started status initialization of nr of acquired frames

Conflicts:
	src/PcoCamera.cpp
	src/PcoSyncCtrlObj.cpp