Remove unneeded API.
Relax objectlib's requirements: it can be displayed not only on top of a DistortedScreen, but any DistortedFramebuffer.
progress with off-center objects.
Further simplifications.
Remove the concept of a 'TwistyActivity' altogether.
Hide most of the TwistyActivity methods inside objectlib.
Move RubikControl to objectlib (as 'ObjectAutomator')Hide ObjectPreRender inside objectlib and move its APi to ObjectControl.
Simplifications
Move ObjectControl, the next big chunk of code, to objectlib.
Move PreRender to objectlib.This code is now shared betweeen the Rubik and Tutorial activities.
Move yet more code to objectlib.It's almost possible to move the PreRender to objectlib now.
Move more code to objectlib.