Also fixed readthedocs publishing and pumped up
docker Pypi module version and updated docs
generation code caused by deprecated properties in
recent version of Sphinx.
Change-Id: Idc69d0e6a06ba6d931acacbd22df076d01901ed0
Readthedocs failed to render Pegleg exceptions with error:
> WARNING: autodoc: failed to import exception ... from module
> 'pegleg'; the following exception was raised: No module named 'click'
Trying to add Pegleg requirements to the installed requirements list,
so that Readthedocs has all modules, including those needed for the
Pegleg itself.
Change-Id: I1780a9be3aeb0c3e2e775cbb1f713c2033f13e08
