Bug 1018321 - Create url to one and done profile page based on username or name

Conflicts:
	oneanddone/users/tests/test_views.py
Remove get() from ProfileDetailsView and update tests
Address review comments
- fix i18n issue
- clean up use of billboard class
- use two views for profile vs myprofile
Address next round of review comments
- fix i18n issues
- make code more succinct
- account for MultipleObjectsReturned exception
- remove code that relies on `request.path`
Merge pull request #157 from bobsilverberg/public_profile

Bug 1018321 - Create url to one and done profile page based on username or name