Fix docs to work
entry_points.txt edited online with Bitbucket
conf.py edited online with Bitbucket
make order of lines in top_level.txt deterministic

like it was done for requirements and entry_points
Added tag 5.7 for changeset 37ed55fd310d
Bumped to 5.8 in preparation for next release.
Merged in moben/setuptools (pull request #76)

make order of lines in top_level.txt deterministic
Add comment to explain code.
Update conf.py to place it below original docstring.
For the sake of expedience, I'm going to accept this and tweak it further. In the future, it's better to have a ticket and reference that ticket in the pull request and commits for better visibility to the changes and issues that it creates. I also suggest providing better commit messages. "Fix docs to work" is barely better than "changed things". The commit message should attempt to communicate the why and the how of the change at a high level. Something like "Added path in sphinx docs to allow setup.py to be imported when docs are built from docs directory."
Updated documentation to reflect support for PowerShell 3 on earlier versions of Windows. Fixes #247.