App Re-Org / PEnemy Cleanup / Enemy&Entity Counts

- I reorganized the App class to start with a menu.
- PEnemy had it's generator method removed as that will be handled
through a constructor.
- Enemy and Entity counts were each made unique and separate.
- PPlayer received some notation updates.
Small cleanup / 'Test' command for menu added.

Did some minor cleanup of unused imports and added a 'test' command for
the menu to use if I need to do some quick unit testing.