Technically, at least one of the -C, -h, and -V switches must be chosen in the first usage sample.
Have to use underscore for max_ratio variable name. Duh.
Add the --recurse option switch. Show supplied values when option schema validation fails.
Mention the Wav2WebException raised whenever validation fails.
Add checks for the oggenc and ffmpeg utilities.
Add gather_files_to_convert() function to pick up WAV and AIFF audio files. Add some test audio source files.