~crc_/napia-rohi

rewrite instruction to opcode mapper to fix some bugs
add a "`r`eserve bytes" directive
display name of unresolved labels now
some work on a preprocessor
save label map to file
add # and - directives
fix some directives that were misassembling opcodes
support new md instruction
add support for uu instruction
split out assembly steps from main()
better README
add considerably more commentary on the instructions
add some comments on syntax and the directives
add some explanation of the embedded unu in rohi
line length reductions in commentry
initial checkin