Distorted Android

Fix several more apps for the 'center-of-matrix-effects-in-screen-center' change.

Merge branch 'master' into empty-matrix-effects-in-the-center

Change Distort to Deform in two apps - looks better.

Move the default center of the matrix effects to the center of the screen (rather than the bottom-left like before)

Improvements for the 'Rubik' app.

Improvements for texturing MeshCubes objects in two apps (in light of the recent change in default texture mapping)

1) new 'Rubik' app (skeleton)
2) MeshCubes: add support for custom texture mappings on each side (Rubik needs that!)

Some improvements to the Wind app - still does not look very realistic though :(

Correct Distort.

Fixes for some stuff discovered while making the Distort effect fully 3D:

- make MeshSphere's normal lengths be 1 (used to be 0.5)
- make the Effect3D app display precise values of the Center and Region vars.