Bug 874152:  trusted content of panel can't access 'addon' object. r=Mossop, a=lsblakk
Bug 871099.  r=bzbarsky a=akeybl
bug 872470 - add EventSource to frameworker, r=markh, sr=gavin, a=lsblakk
Bug 872839 - Part 1: Put new PeerConnections on global list earlier, ensuring close is called should PC.initialize fail. r=jesup a=akeybl