Adding John Martin to CREDITS for his video work

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@31715 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CREDITS

@@ -122,6 +122,8 @@ Voop A/S, Nuvio Inc and Foniris Telecom A/S - funding for rewrite of SIP transfe
 Philippe Sultan - RADIUS CDR module
 	INRIA, http://www.inria.fr/
 
+John Martin, Aupix - Improved video support in the SIP channel
+
 === OTHER CONTRIBUTIONS ===
 John Todd - Monkey sounds and associated teletorture prompt
 Michael Jerris - bug marshaling