Changes since 5.13.1.210
FEATURE - Director - Camera Previews are now proxied straight to the Director Frog rather than via DirectorAgent
BUG - Fix for date time offset subtraction error in client line timer
BUG - Improvements to Webclient shutdown, session management and Director
BUG - MJPEGServer disposal and Receiver Keep Alive
BUG - Regression in call creation causing some relay and hold calls to fail
