#205; Added admin index screenshot
#205; Added select user screenshot
#205; Added change user screenshot
Merge pull request #212 from RyanBalfanz/develop

#205; Added index, select user, and change user page screenshots
Add @ryanbalfanz to the list of authors.
Adding a contributing document
Adding a contributing document
Merge branch 'develop' of https://github.com/twoscoops/django-admin2 into standardize_html