Distorted Android

New effect VertexEffectDisappear

Fix normals in case of MatrixEffectScale / Shear.
Fix displaying the normal vector.

Fix modifications of normals in VertexEffectScale and VertexEffectShear.

When blurring or glowing, we need to CLAMP_TO_EDGE the texture - otherwise part of the blur or glow could appear on the other end of the texture.

Fix the fact that Distort was rotating normals outside of its region!

Fixes for pausing and restarting.

Update Myanmar flag.

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

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)

Fix VertexEffectRotate.
'MeshJoin' app now back it its functionality from 'master'