A few updates:
Invitation Form - email address field is now required, and a failed validation now results in error messages being displayed on form

Middleware - all views except NotBetaView are now off limits to users not in the beta.  This prevents users from accessing /invite/ via URL despite not being in the beta themselves

URLs - hunger-invite-sent raised an exception upon request because it was not called via the as_view() method
Added existing requirement of django-registration to requirements.txt
Updated tests.py to account for successful negative (ie, redirect) testing when users should not have beta access
Integrated cleaner whitelist_views check
Fixed comment typo
Merge pull request #41 from mypetyak/master

Patching a few gaps