add password protection to /admin namespace
allow user to edit their account
added ability to edit user password by admin
added Devise spec helpers
added users controller spec
added registrations controller spec
added login_admin to admin controller specs
allow to delete a user
fix creating users
moved loading mailer config to initializer and excluded test & dev environments
added mailer config to shared dirs
added authentication to /trade namespace
added login_admin to trade controller specs
added sign_out link
Merge branch 'admin_can_log_in_and_out' into develop