Introduce Effects.blitPriv() (faster than previous drawNoEffectsPriv)
Speed up shaders (both compilation and execution) by explicitly enabling only the needed effects.
Preparation for shader optimization
Fixes for z-fighting.
Bug fix in RenderState.
Make it possible to render each DistortedNode with adjustable OpeGL state (writeing to Color, Depth,Stencil buffers, DEPTH, STENCIL, BLENDING on.off, etc)
New 'RenderState' class which will be used to change OpenGL state when rendering Nodes.
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