if camera count > 0 and no main is found, display error. if 0, continue warning / creating main camera
if camera count > 0 and no main is found, display error. if 0, continue warning / creating main camera

killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity,DDReaper/MixedRealityToolkit-Unity,killerantz/HoloToolkit-Unity,killerantz/HoloToolkit-Unity