Add user account status class
Show user status on the user listing table
Move organization support from UserAccount to User model.

Previously we required an account to associate a user to an organization.
Support unified remote user directory search

Support searching both staff and user backends via a common interface.
Add users to organization

Support adding existing or new users while on organization page.
Add remote user

Support adding remote user to an organization
Merge pull request #774 from protich/feature/org-add-user

Add users to organization

Reviewed-By: Jared Hancock <jared@osticket.com>