Verizon filter change

Issue Summary

Thanks very much for this module. I noticed the Verizon picture message text changed, so the current filter doesn't work. Here is the regex that worked for me:

< $end_pattern = preg_quote('This message was sent using PIX-FLIX Messaging service from Verizon Wireless!');
---
> $end_pattern = preg_quote('This message was sent using the Picture and Video Messaging service from Verizon Wireless!');