* A variety of bug fixes
** Twilio SMS bug
** bug with voipsessions not loading for outbound calls
** label and explanation associated with phone prefix conversion in /voip/call/settings
** bug in voipsession.inc that affected inbound call sessions
** bug that affected outbound calls in Tropo
** #1789272 - Trying to get property of non-object warnings
** #1789234 - variable $channel always NULL
** Changed the return value of addGetInput() from '' to 'no_input'