Rubk App: improve 4 buttons in the top.
RubikCube: make the post-rotation effect 'nice'.
Many things.
1) make the Dynamic.setDuration() able to be called AFTER the Dynamic has already been run. (and rename it to 'makeRunNowFor()' )2) remove the automatic removal of zero Effects from EffectQueues.3) adjust several Apps to cope with 2)4) add post-rotation to Rubik (still not finished)
RubikApp: properly compute cameraDistance and FOV.
RubikApp: simplifications.
RubikApp: simplify SurfaceView
Improve the architecture of the Rubik App: new RubikCube class.