Move more code to objectlib.
Remove all files that have been separated into a new library 'objectlib'
Prepare the 'objectlib' package to be separated into a library module
Refactoring: split the 'objects' package into two, 'objects' and 'objectlib'.The point: we're going to need to move the 'objectlib' stuff into its own library module, and that's because we're going to create a new app module which needs access to it.
Move actual solving the object to PreRender.
(before we had a 'solveObejct()' in preRender already, but that one just starts the Solve Effect!)
Abstract the part that controls the 'Locked' and 'Back Moves' buttons from the two activities: the main one and the tutorial one.This code had been duplicated there.
New 'tutorial' activity.