Changes since: Audio Server v2 2.7.0.7
NEW - Add support for SDP FMTP attribute with OPUS
NEW - Implement support for more OPUS bitrates
NEW - Add ability for OPUS bitrate to follow what is being sent
NEW - Refactor to take PhoneBox reference away and move SDP class library to BBCommon.Sip
FIX - Improve call recording to network paths
FIX - Benign error during purging when default ringtone wav is present
FIX - Build to incorporate positive custom payload number fix for skype and VX handsets
