Distorted Android

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.

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

Exclude still more methods from public documentation.

Exclude certain public methods from Javadoc API.

Exclude certain public methods from Javadoc API.

Minor.

Things seem to be working - switch off all debugs.

Bugfix in EffectQueues: if we interpolate something, then stop and again start interpolating, it used to use the old position (position from the moment when we stopped interpolating!) during the first run after the resume. Fix that.