Add setting to disable monkey patching and a custom user model mixin to replace it.
Add docs about monkey patch change.
Fix some typos in the custom-user-model doc.
Update tests for work for all versions.
Import skipIf from Django for Python 2.6 support
Use a skipping mechanizm that can handle unittest 1
Pass a message to the skip.
Update to bring in line with project's preferred styles.
Merge pull request #220 from emperorcezar/devel

Add support for disabling the monkey patching and using a mixin