CHANGELOG updated.
CHANGELOG updated.

voxbone/JsSIP,ronlobo/SIP.js,markandrus/SIP.js,onsip/SIP.js,AaronZhangL/JsSIP,DrumTechnologiesLtd/JsSIP,josephfrazier/SIP.js,vconsult/JsSIP,dpocock/JsSIP,Escaux/SIP.js,onsip/SIP.js,tqcenglish/JsSIP,Voiceworks/SIP.js,CodeYellowBV/JsSIP,rusekr/JsSIP,joseph-onsip/SIP.js