Adds admin column to users table.
Allows users to see emails for members of their projects.
Prevents users from editing other users and removes email from show page for some users.
Fixes typo in users_controller
Moves before_action methods to application controller and fixes user index bug.
Adds require_admin method for user edit and destroy and permits admin to see users and projects.
Permits admin to see project show page.
Adds admin option for admins creating users.
Allows admin to access everything.