bugfix/reformat uslash.asm
uslash including fixed eforth variant
Merge pull request #2 from JeeeK/uslash

uslash including fixed eforth variant
tabs to spaces
Merge pull request #3 from JeeeK/uslash

tabs to spaces
fix underflow, testvalue comments
Merge branch 'uslash' of https://github.com/6809/sbc09 into uslash
overflow handling, more docu.
doc fixed
doc fixed (#2)
Merge pull request #4 from 6809/uslash

Uslash finally fixed (hope so).