New contact version with indexed address fields.
Use index lookup to find contact by address.
Add the group action state to the dialogue state type <select>
Add a GroupStateModel
More address field indexes, better tests.
Fix ContactStore.new_contact_for_addr().
Fix ContactStore.contact_for_addr().
No need to keep old versions of ContactStore around.
Add a groups relation to the dialogue model
Add boilerplate for dialogue group state views
Change GroupStateModel to not be storable on the contact
Use 'screen' instead of 'question' as the term for 'states' in the UI
Remove now-unnecessary migration index hackery.
Change dummy_polls fixture to include a group state
Support group state in dialogue app
Remove unused group state fixture data (copy-paste error)
Change group dialogue state to add the group directly in the state creator, instead of in a 'state:enter' listener
Sort contact group when checking in test for dialogue app group state
Handle cases where a dialogue state group has not yet been assigned a group
Contact migration script.