Adding credits for SIP transfer work

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@31636 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CREDITS

@@ -117,6 +117,7 @@ Slav Klenov & Vanheuverzwijn Joachim - development of the generic jitterbuffer
 Roy Sigurd Karlsbakk - providing funding for generic jitterbuffer development
 	roy@karlsbakk.net, Briiz Telecom AS
 
+Voop A/S, Nuvio Inc and Foniris Telecom A/S - funding for rewrite of SIP transfers
 
 === OTHER CONTRIBUTIONS ===
 John Todd - Monkey sounds and associated teletorture prompt