Add support for a "HELP" verb in the HackMyResume CLI, allowing separate help
pages for each HackMyResume command per #205. The following command invocations
are recognized.
hackmyresume help
hackmyresume help build
hackmyresume help new
hackmyresume help convert
hackmyresume help analyze
hackmyresume help validate
hackmyresume help peek
hackmyresume help help
Fix output file name glitch, writing CSS files to destination folder,
and an issue where the process would evaporate before PDF/PNG generation
could complete.