cosmetic changes
changes to alphabet, now exports getAlphabet and uses parselib; parseReg now error checks against using symbols not in alphabet; work on ParseLang
fix bug in alphabet, was not detecting escaped newlines, etc., which Haskell added to input descriptions
Working lexical description parser finished; fixed same bug in regex parser because I forgot to use alphabet functions
fixed bug in alphabet; ranges over all \x chars and 'printable' subset using Data.Char.ord; all 4 lexical descriptions are succesfully parsed