use unicode literals everywhere
convert tab to spaces
document what we're planning to do
Allow local_settings to set STANDARD_GITHUB_REPO

and add setting for where to find docs in the repo
Start writing way to convert arbitrary markdown docs to html

See the README_CONVERSION.md for what we do.  This commit includes:

* new python packages required for local git manipulation
* deploy script to ensure required directories exist
* code to export commits from the repo
* code to convert the exported markdown into HTML
* a management command to trigger the export to help testing