ref #77 move setUniform for buffer textures to painter.cpp
getter for up, eye, center in camera class, #91
Merge remote-tracking branch 'origin/SaveCameraPosition' into PathTracingGPU_77

Conflicts:
	libs/core/camera.cpp
ref #77 replace created camera in cgsee.cpp with PathTracer

+ needed refactoring
Add bool initOnly to draw(), to initialize buffer objects for geometry without actually drawing them.
Pass camera position to current shader.
Try using camera position for pathtracing.. no really working