GXemul Code2

Better separated out warning detection code.

Minor updates to the TODO.

Fix doxygen warning.

Making sure that when invalidating virtual addresses in the dyntrans cache, take into account that not all CPUs can use all 64 bits for virtual addresses. This fixes a very old bug which affected Glatt MU/MK.

Minor updates to the TODO.

Adding a section to the documentation about how to use the emulator as a debugger (breakpoints, unassembling, single-stepping, inspecting registers, and so on).

Minor update regarding the new framework.

Moving new framework stuff to the end of the index.

Minor update; moving old framework before new framework in the SYNOPSIS part.

i960 experiments...