Message models now have a string property identifying their owner.
Conversation models now store the number of people in the conversation, as well as the keys of the people subscribing.
Added a mapping function to get messages and their details.
Implemented conversations and messaging.
Feedback is now sent to the admin email.
Adjusted bootstrap alerts about emptiness (inv, plist, locs) to be more friendly to new users.
Setup and profile edit now specifically ask for the contact number of the user.

Known bugs:
The logout button in the conversations page links back to the conversations page.