twilio/twilio-php — pull request #179 by llwt (2014-06-18 14:17:52+00:00)
Title: rename references to Services/Twilio/Rest/Sip to SIP to match class name

PSR-0 Compliant autoloaders require that class names match
their file names and are case sensitive. In this particular
case integration with Symfony2 was broken due to the naming
mismatch.

ref: https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md