The Djblets codebase was still using the upstream Google doc format

found in Sphinx's Napolean processor, which doesn't offer the advantages

that the Beanbag processor uses. This change moves us to using the new

Beanbag one.
Due to a bug in the Beanbag processor, though, parts of our codebase

docs were failing. The processing code wasn't supporting arguments in

the form of:
varname (type): description

While this is being fixed in beanbag-docutils, it was a good opportunity

to clean up those parts of our codebase, bringing them in line with how

we're writing the docs now, and fixing up some bad type references and

missing descriptions within the same files.

Built the docs successfully. Checked for errors in affected code, and

checked that new doc features were taking effect.