Change welcome letter email & update forum list

This pull request does the following:

* Fixes #119. Changes the welcome letter email from "brigade-info@" to "brigade@"
* Updates the forum list on "/pages/forums" to reflect name and URL changes. The changes are as follows.
    * <b>Open NY Forum</b> is now <b>betaNYC</b> and its URL has been changed.
    * <b>CityCamp Raleigh</b> is now <b>CityCamp NC</b> and its URL has been changed.
    * <b>Code for Virginia Beach</b> is now <b>Code for Hampton Roads</b> and its URL has been changed.
    * <b>Code for San Francisco</b> has a new URL.
    * The URL for the <b>Councilmatic</b> app forum is broken and has been fixed.