Move actual solving the object to PreRender.
(before we had a 'solveObejct()' in preRender already, but that one just starts the Solve Effect!)
New 'tutorial' activity.
Rename some classes.
Convert the PostRender to a PreRender, called before we render.This makes more sense as this way things are prepared for the very first render.
More support for the 3x3x3 Solver: more of the actual 3x3x3 solver mechanism.