Adds Conversation / Message models with appropriate methods
Adds initial Messages controller / views
Adds message sending and read column to messages
Adds read/unread message visibility
Adds messaging from profile link
Adds one-way match percent calculation
Completes user match percentages
Adds enemy calculations
Adds dependent destroy for Question deletion
Amend schedule
Adds seen column to visits
Adds tracking of unseen visitors/Visitors view
Sets up searching with sunspot
Fixes new member match bug
Finishes searching w/o associations