Distorted Android

Progress with DeferredJobs (apply, copy, merge & join should be working now - untested)

1. New icon for PreDeform app
2. Library: advances with DeferredMeshJobs

Bugfix ( Mesh shallow copy wasn't working )

First attempt at Deferred Mesh Jobs.
Only apply(VertexEffect) supported for now.

Correct VertexEffectQueue in the Mesh. There's no need to have a separate Queue in every component.

Only show the OpenGL Error dialog when the underlying hardwarre does not support OpenGL ES 3.0.

Preparation for saving/reading Meshes to/from a file.

Progress making it possible to apply Vertex Effects only to some Components of a Mesh.

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

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)