More unifications, changed all Map*() methods to use a single
B2DHomMatrix which is created based on former stuff, XForm now
completely replaced. To check, added debug-only code and switches
to the VclPixelProcessor so that visual checks get easy when
using these modes (overlay of both methods with modded colors).
Also resynched to master.

Change-Id: I7b749f90bfde2ec1c2e49ee90ca2ef368da0547e