Allows www-data user to send reminders

Requires adding an alias to the update_reminder perl script to a system directory
and executing that instead of the perl file directly.
Adds template for user modification (root only)

Adds domain and user ID to global JavaScript variables
Adds support for user deletion
Adds support for resetting of passwords, toggling of user disable, and domain modification
Adds support for the changing of usernames
Allows modification of user services

Creates a new window allowing selection of services, saved in real time
Requires significantly more information to be returned in account info request,
including the list of users, domains, services, and a list of services per user