KBUS and muddle documentation now on ReadTheDocs

The HTML documentation for both KBUS and muddle is now being hosted on Read the Docs, who are providing a wonderful service to those of us using Sphinx for our documentation.

See http://kbus.readthedocs.org/ and http://muddle.readthedocs.org/ respectively.

The documentation should be rebuilt  each time a push is made to the appropriate repository. Including, of course, a change to the documentation. So I've no excuse, then...