update setup.py to not package support for tests

thanks to info I found in
http://blog.schwuk.com/2014/03/19/using-tox-django-projects/
bump django 1.7 to latest rc
simplify requirements and add factoryboy==2.4.1
stfu, django
get test runner to shut up for stupid django 1.7 warnings
slowly migrate away from using fixtures
shutup, factoryboy
get all tox tests to pass again finally
doc when to delete this weird setting
Merge pull request #20 from texastribune/django-17

Bump tox to test latest Django 1.7