Django backend for BISmark user registration. 

Workflow includes passing of an OAuth2.0 authentication token to verify that a user has registered. 

Directory layout: 

bismark-app: Contains necessary forms, views, and models to interact with oauth2app library and django-registration library

bismark-home: Home folder for settings, templates, static files

email-usernames: App extends django-registration allowing user registration by email rather than by username

oauth2app: App manages server-side of the OAuth2.0 protocol by producing tokens and managing authentication. 

To use oauth2app outside of the current framework, note the following: 

- OAUTH2_CODE_EXPIRATION, OAUTH2_ACCESS_TOKEN_EXPIRATION set in settings.py are set for 1 week and 5 years, respectively. 
- /authorize protocol is ignored, see http://oauth2app.readthedocs.org/en/latest/ for proper usage. 
- Client objects are not used as intended, see above. 

Other notes: 

Django user's username field not used as intended, libraries edited to make it non-unique 'none'. User's email field used instead. 

OAuth2.0 authentication flow as implemented: 
	- form submit links to oauth2/authorize
	- oauth2/authorize automatically generates request code, redirects to /client
	- if valid access token, store, otherwise send request to oauth2/token and refresh
	- Tokens authenticated at /check