Major refactoring. merged ui.py into gamestuff.py.  merged half of world.py into gamestuff and the other half into entities.  Able to SIGNIFICANTLY reduce the number of import statements.  Next step is to try to remove as many 'from x import *'.
Removed some 'from X import *" statements.  The only 'from X import *' are for the standard imports: constants and gamestuff.  Dungeoneer.py and map.py changed to 'import entities'. Dungeoneer.py also changed to 'import map'.