use bounds-checking for speeding up splitting huge areas
Use a list only
does not need to be an array list
drop useless variables
added zoom and pan functions for debugging
some minor fixups of the painting
minimal test code for testing the area triangulation
Speed up the triangulation by using bounding boxes. Forget about them afterwards again
(they would require additional ram, that might be not avilable)
added some features to the debugviewer