added validation for making sure all foreign keys/one to one fields in an activatable model cant be cascaded
100% coverage
updated readme and tests
 made docs more clear
 made docs more clear
 made docs more clear
added proper returns
fixed setup.py
Merge pull request #1 from wesleykendall/develop

Django activatable model initial version
Merge pull request #2 from ambitioninc/develop

Initial version of Django Activatable Model