created rtt sample
Merge branch 'master' of https://github.com/motion-twin/h3d
bug with hxd.res in embedd mode...
demo 2d partially enabled in opengl
isolated drawElement bug wit an Axis of sample and 2d quads on gl
improved traces levels
added get_driver to enable easier hw access
enabled scissor test on gl
started RenderToTexture and read many docs...