sphinx based docs

[menno]

publish on web site too

[menno]

Ensure that the new "debug" and "log_file" properties/attributes are documented properly.

[menno]

This is done but....

• see if inline literal font can be made the same size as the normal paragraph font
• include the html docs in the release
• use readthedocs.org for the hosting
• have the docs be automatically uploaded

[menno]

Using sphinxdoc theme which fixes the monospace font size and looks nice anyway.
Waiting on whitelisting at readthedocs.org (due to autoclass usage).

[menno]

Update PyPI meta-data to include documentation link? If there is a such a thing.