Initial pre-release

Very preliminary release of SoundSwallower, which may or may not work! The API is subject to change but is basically the same as PocketSphinx/SphinxBase just in the 'soundswallower' namespace (for both C header files and Python modules).

The Windows wheel was built with Visual Studio 2017 and should work with Python 3.7 there... the Linux wheel is built on Ubuntu 19.10, so I am unsure if it will work for, well, anybody. Yay, Linux.