BOOK-701, anonymous field on donation: front and backend, tests
Merge branch 'feature/fund-loving-criminals' into feature/BOOK-701

Conflicts:
	bluebottle/bb_donations/tests/test_api.py
	bluebottle/bb_donations/views.py
	bluebottle/settings/testing.py
	test_settings.py
Merge pull request #909 from onepercentclub/feature/BOOK-701

Feature/book 701