Syntax highlighting

[benbusby]

Depends on how #1 is implemented, and is maybe a little goofy, but it might be nice to be able to quickly visually parse what a raw.y2k file contains, where lines starting with different commands are highlighted different colors, and comments are highlighted in an obvious color.

This is obviously heavily editor dependent, but would be neat if there was at least a Vim syntax theme and maybe support in Pygments.