Magic Cube

1. Remove 'db level' from objectlib (this belongs to the app!)
2. change ScreenPlay's 'mObject' to be an ObjectType.

Move yet more code to objectlib.

Reename ObjectList to a more logical ObjectType.

Simplify ObjectList: now there's just one object per size.

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.

Remove class referencees from ObjectList.

Correct height of the tutorial dialog.

Make it impossible to launch more than one Tutorial screen at a time.