Minor
Change the the render() API!
THis introduces some regressions with the Effects3D app.
Major: change of API.
Split DFramebuffer into Framebuffer and Screen; introduce the 'DistortedInputSurface' and 'DistortedOutputSurface' interfaces.
Try using OpenGL ES 3.0 everywhere (but if device does not support it, try creating 2.0 context - this is important because of the emulator!)
rename all the 'grid' variables to 'mesh'.
Rename Grid to Mesh
New DistortedProgram class.
Again change of API. Now instead of the 'DistortedEffects.draw() and DistortedTree.draw()' we have 'DistortedFramebuffer.renderTo()'
Change of names.
Change in the API: we always have to create a DistortedFramebuffer to render to.
Some improvements for StarWars's behaviour after onPause(), but it doesn't really work yet.
Remaining 'onPause-buggy' apps: StarWars, Save.
Complete the split DistortedObject -> (DistortedTexture,DistortedEffectQueue)
Rename various classes; fix a bug in Around the World.
Major change in API: separate the GRID from DistortedObject; completely remove classes derived from DistortedObject.
Make the effect Center be always 3D.
Unify Effects3D and Matrix3D (still incomplete!)
Minor stuff
Tidy up 'Matrix3D'
Skeleton of the new App: Vertex3D. So far just a copy of Matrix3D.
Rename Effects3D to Matrix3D