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.
add possible scrolling to the 'object' popup in case the grid of objects does not fit on the screen.
New 'tutorial' activity.
Rename some classes.
Object node: size of screenWidth.
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 progreess porting RubikCube.