Now that this section is so small, I think I can see a possibility
for cross-compiling Collapse OS entirely, which would be great
because we could get rid of the relinker.

This leaves space for xcomp-core which is growing.

And refreshed description.

I need RSHIFT and LSHIFT first...

I'm reserving the 100-200 range for non-bootstrapping needs.

And adjust rc2014/eeprom recipe

The way is clear for complete stage1 bootstrapping on the RC2014
target!

We can get rid of acia.z80, but not of acia.fs yet, we still need it.

I don't remove z80a.fs yet because build process needs it, but that
will change shortly.

and remove cfspack, which will not ever be used again.