This makes pocketsphinx pick up way fewer false-positives of single
number-words as recognised sentences.  It doesn't seem to make any
difference in anything else, but fewer false-positives is always nice.

They still need work of course, since I'm a programmer and not an
artist.  The new icons of course are Kaylee's parasol, and anyone who
doesn't know that needs to watch Firefly.

The argument parser isn't part of the API of the Config class, so now
its name reflects that.

Commands aren't stored in a special file anymore, and Kaylee never tries
to look at that file.  Therefore, there's no need for the Config object
to keep that file's path, and so the path has been removed.

Added some blank lines and wrapped some long lines to be closer to PEP 8
compliance.

Improved docstrings in NumberParser class.  Added docstrings for
undocumented code and removed a TODO message that no longer applies.

Apparently CMU thinks it's a good idea to release a new version of a
piece of software that breaks existing APIs without even changing the
version number.  I find this idea to be highly dubious at best.
Nevertheless, I have updated Kaylee to support the latest version of
pocketsphinx.

That's "Kaylee Voice Command" if you didn't figure it out.  I think
everything still works properly, but I'll do more testing later to
verify.