Distorted Android

- fix Around the World (one effect failed to add)
- add DeferredJob icon

Progress with Deferred Jobs.

Skeleton of the new app: Deferred Jobs.

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

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)

Progress with MeshJoin.

Progress with the Predeform app.

Progress with Predeform: UI for the list of Vertex effects to preapply.

Progress (?) with Predeform: give up trying to render the Mesh in Activity1.

Progress with Predeform.