Initial import of prettify.
Switch to argparse, permitting further clean up of code.

(Still some weirdness with pipelines.)
Add prettify to the README.
Switch to reader/renderer pipeline, arg reshuffle.
Add very hacky HTML renderer. Needs cleanup later.
Realign ending parens for consistency.
Merge pull request #3 from bit-shift/prettify

Added prettify.py to utilities.