Fixes for memory leak problems uncovered by the 'Rubik' app. (mainly: new method DistortedNode.markForDeletion)
Port changes from the 'distorted-cube' target.
Rubik App: minor
Rubk App: changes in the UI
Rubk App: improve 4 buttons in the top.
Rubk App: add 4 buttons in the top.
Improve the application list.
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: minor
RubikApp: make the rotations smooth.
RubikApp: simplifications.
RubikApp: simplify SurfaceView
Improve the architecture of the Rubik App.
Improve the architecture of the Rubik App: new RubikCube class.
Improve the Rubik App - rotation works now.
Improve the Rubik App - beginnings of rotation.
Improve the Rubik App.
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