[CDG5] Figment Memory Manager

[Elliot Nunn]

I have gotten some of the ROM Figment Memory Manager to build from
source (mostly C). Some post-SuperMario changes to the system of sanity
checks prevented me from easily building the entire Manager. One
particularly interesting file is now built properly: ProcessMgrHeap.c.
It is practically unchanged in the 1993-2003 timeframe. Daniel, I know
that you were interested in those routines to help us hack the Process
Manager heap to work with discontiguous ranges. Let me know if you have
a look.

https://github.com/elliotnunn/supermario/commit/72f7a94