Fix the source directory for Sphinx to load packages from.
Change around a bunch of Sphinx settings.
Reorganise Sphinx documentation directives in the doc/*.rst files.
Add Emacs orgmode → html output for doc/DETAILS file.
Add generated Emacs orgmode → html output for docs/NOTES…audit.org file.
Update Sphinx templating and stylesheets.
Update docstrings for v1.1.6 Sphinx generation in gnupg.py and _parsers.py.
Merge branch 'fix/docs-1.1.6' into develop