Added support for multiple admins

Review Request #2670 — Created Oct. 23, 2011 and discarded — Latest diff uploaded

Information

Review Board

Reviewers

* Admins names and emails can be added and removed through admin UI.
* New User registration emails will send to all admins.

This patch go with another patch in djblet:
http://reviews.reviewboard.org/r/2671/
Unit tested. The result looks good except some failure due to Windows environment.
Manually test:
* Manually added and removed admins in FF, Chrome, and IE. Worked as expected.
* Ran "prepare-dev.py", admins settings was migrated properly.
* Registered a new user, email notifications sent to all admins.

Screenshots