Magic Cube

Switch off showing FPS.

Report an Analytics event when a user changes State or Object.

Report a Crashlytics non-fatal if we fail to compile some shaders.

Hopefully get rid of the most common crash in the field right now by changing the States to always create all their Views from scratch.

1) Cube: convert it to the latest library. Main difference: objects are rendered better, individual cubits have rounded corners.
2) Examples: some adjustments to MeshJoin & Predeform
3) Library: fix a bug in main_vertex_shader's 'degree' function, which didn't work proprely in case of a vertex which was exactly at the center (i.e. vector PS was zero)

In library: allow a mixture of a deep and shallow copy of a Mesh ( mVertAttribs1 might be copied deeply or shallowly, mVertAttribs2 are always copied deeeply).
Port RubikCube to the new library.

Fix a nasty logic error that let people submit bogus results.

Fix for the next crash seen in the field.

Fix for a crasher seen in the field.

Minor.