Distorted Android

First attempt at the MeshBase.apply(VertexEffect) API.

Do not crash if we failed to compile some programs.

Lower requirements - now only OpenGL ES 3.0 is required; if running on such platform, OIT part of the API ( which is the only one which actually requires 3.1) is switched off.

Bugfixes in MeshBase:

1) improper buffer was being invalidated after apply and setTextureMap (TFO rather than VBO!)
2) setTextureMap would only work if all components were being set

Speedup: only allocate one postprocessing buffer set of the quality we need, not all in one go.

1. library: new API DistortedNode.setProjection()
2. cube: adjustments for Pyraminx.

Fix the memory test - we need to run one thing on the Graphics thread!

Fix MeshBase.join()
Only upload Mesh Buffers to GPU when we actually use them.

Further corrections.

Correct the Rubik app for the recent changes to the library's Node.