Merge pull request #4 from cgoodling/origin/abby

Added functionality to get ending address
NOP
Update asciiToHex.X68
Fixed my gitastrophe

manually merged my changes with Abby's changes.... my bad
Commented opcode decoding

Added comments to the decoding function opcode. Also added comments for the NOP case.
Added opcode for MoveB, with data register direct EA (tweak as needed), commented out ending address prompt