Adding crappy command-line options so that I can check multiple output styles without recompiling. Make sure you get the command-line options right or there will be segfaults.

Cleaning up and correcting the nested-style emitter. Now handles arbitrarily nested rule-less rulesets. New spec test added and passed.

Getting the nested-style emitter working on basic cases. Still buggy on multiply nested empty rulesets.

Moving the parsing functions into their own file. Also adding emitter drivers to the Document class.