added detail to README that will help new users setup the repository
Update README.rst

fixed sub-sub heading underlines which broke GitHub rendering
added clause to README detailing managing fall-back repositories with pip
Merge branch 'master' of github.com:aquamatt/djangopypi
corrected pip command with multiple repos
Update README.rst

Minor correction picked up by reviewer.
instructions for proxying to upstream index added to README
Update README.rst

corrected rst formatting; moved footnote to foot.
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