[Tr] Remove redundant targets in NEWS file.
[Tr] Fixed label zsh completion arguments.
Updated alternatives document.

Many of the pros and cons have changed since the doc was written.
Clean up Sphinx configuration.

All of the boilerplate stuff just gets in the way when you're changing
options.
[Tr] Fix cmdoption directive in usage doc.
Clean up the copyright and credits attribution.
[QA] Fix whitespace failure.

And kick the buggy commenting plugin I was using.
Build Sphinx output in to default build/sphinx dir.

Apparently, people expect this now.  Fair enough.