Basic sphinx documentation layout.
Short introduction paragraph and integrating the contributing page into the TOC.
Enabled admin at admin/ in example. Put admin2 at admin2/.
Merge pull request #34 from audreyr/master

Get example project working with /admin/ and /admin2/ urls
Merge pull request #32 from gregmuellegger/master

Fixes #14 -- documentation layout
Merge pull request #33 from RaphaelKimmig/master

Use relative import for models in example project
Fix example urls include regex