Add Audited gem to track users and locations
Add basic user audit view
Modify user audit log to be entirely a table.

Removed the log details; the intent is to put those into a separate view later.
Add audit detail data back in, styled to be small.
Add back button to user audit page
Add audits page for locations
Add authenticate_user to all User actions except new and create
Add admin option to confirm or unconfirm users
Merge branch 'development' into add_audited
Merge branch 'add_audited' into development