Adds SMS support. Requires database refresh.

Assuming users are configured correctly from the admin console, this should "just work." Obviously a UI still needs to be hooked up, but the back end is functional. Phone numbers should be entered as only digits (e.g. 4238759200 instead of (423)-875-9200), and the carrier must come verbatim from the list in SmsEmailTemplate.java. Implements issue #140