Start work on backend user
Start fleshing out login/auth
Starting work on user registration
Revert "Starting work on user registration"

This reverts commit a262bb0d1de4c3812247ee487a8e627a8b722e9f.
Remove unneeded user registration code
Fix logout bug, added logout link
Require auth at top of ApplicationController
Tabs => Spaces
Require both email and password in model, unique email
Modified migrations and schema to use better constraints
Revert "Modified migrations and schema to use better constraints"

This reverts commit 567af9ce056aa127eaab1429065fb266549ee6c2.
Require email address (unique + index), remove password column, require
password_digest
Members table rather than users table
Merge pull request #13 from Pitt-CSC/registration

Authentication