progress with off-center objects.
1) introduce possibility to move objects, i.e. display them not in the middle of the screen (not fully functional yet)2) do away with unneeded any more interface 'EffectController' - since ObjectPreRender is the only implementation now.
Remove the 'setupObject()' redundant API.
Remove the concept of a 'TwistyActivity' altogether.
Bugfix: we shouldn't be calling TwsityObject.solve() directly from the app, only through ObjectControl.solveOnly().
Simplifications
Move RubikControl to objectlib (as 'ObjectAutomator')Hide ObjectPreRender inside objectlib and move its APi to ObjectControl.
Move PreRender to objectlib.This code is now shared betweeen the Rubik and Tutorial activities.