first implementation of rendering process

- made cOpenGL mMdlQueue public
- added reference from cRender to cOpenGL
- changed some things in cRay::fCalc
- implemented first simple ray tracing algorithm (still camera issues)
- fixed cVector3f::fCross
Merge branch 'master' of github.com:ManicPumpkin/AgK-CG-MAI3

Conflicts:
	prj/inc/c/cRayTracing.h
	prj/src/cRayTracing.cpp