RomWBW/Tools/unix

This tree now contains makefiles and tools to build on Linux and 
macOS. Linux is rather more thoroughly tested compared to macOS.

To get here, TASM and the propeller generation tools needed to be 
replaced, and since the unix filesystem is usually case-sensitive, 
and CP/M and windows are not, the cpm tools were made case-insensitive.

TASM was replaced with uz80as, which implements a subset of TASM and 
fixes some bugs.  However, I needed to add some functionality to make 
it build the sources as they exist in this tree.   In particular, one 
thing to be very careful of is that TASM is not entirely consistent 
with respect to the .DS directive. it's usually a bad idea to mix 
.DS, .FILL, .DB with .ORG.

	.DS n is best thought of as .ORG $ + n
	.ORG  changes the memory pointer, but does not change the file
	      output point.  It works a lot more like M80, SLR* .PHASE

It assumes that you have some standard system tools and libraries 
installed, specifically: gcc, gnu make, libncurses, and srecord.
Typical