Add an argument specifying an input file
Add comment syntax
Relax definition for VAL tokens

Values muest be able to include ':' characters in order to be able to
call ourselves.
Add a test script recursively calling all other tests
initial work on task 1 (in Haskell)
Simplify test.grash with true/false
task1: fix booleans (0 is true, 1 is false)
task1: allow equality check on paren-exprs too
task1: ?: return -1 if out of range
Document task 2
task1: English translation of spec
English translation of task 3 specification
task1: add a stack pretty-printer
task1: rewrite eval for real step-by-step and pretty-print support
task1: parser: make toEnum-fromEnum crud more self-documenting
task1: perform SBS evaluation of the factorial calculation
task1: fix noncommutative binop operand order (fixes factorial sample)
task1: improve docs and reformat code to beautify lhs2TeX output
task1: add doc.lhs -- call lhs2TeX on this to get the docs
task1: rewrite Main to match the specification