auto remove .0 and trailing spaces
fix math in README
Revert "add automatic variable replacement"; it doesn't work at all...
--- psh-rpn+ -- RPN calculator in pure sh /with float support/ ---- successor to postsh --- Caveats -- psh-fractional is still WIP -- most functions work >70% of the time -- but errors are still possible and are likely -- additionally remember that sh has a max number of (2^63)-1 ---