Distorted Android

Now there's a single place one can have a look at all the Meshes being rendered to a OutputSurface: OutputSurface.renderChildren().
This will need to get modified for per-object post-processing.

Minor

Speed up shaders (both compilation and execution) by explicitly enabling only the needed effects.

Fix Crawl transparency in StarWars.

Small improvements for StarWars, but the main issue - non-working transparency of the Crawl - not solved.

Fixes for z-fighting.

Make it possible to render each DistortedNode with adjustable OpeGL state (writeing to Color, Depth,Stencil buffers, DEPTH, STENCIL, BLENDING on.off, etc)

The only operation which is now enabled 'statically' in render() is blending.

1) stop culling back face
2) reset OpenGL state beore each render (and not in onCreate)
3) Improve Matrix3D so that we can test negative Scales

A Lot of fixes for the issues uncovered by Olimpic.

Still at least 1 known issue: sometimes, when we re-add a Surface, some garbage pops up on the screen for a brief split second. Visible in Olimpic.