m68k

As the m68k port is getting shape, maybe some of you want to give a hand, so here is how to set up the environment. After explaining the choice of the target platform we'll start with the build system, then the emulator to debug on the chosen platform.

I've been getting further recently on the 68k port, as you may know already everything now compiles but the kernel is still largely stubbed, misses drivers, and the bootloader doesn't load it yet.
I've almost finished mmu setup, at least for the 040 ARAnyM emulates.