webrtc.js: Improve API error reporting
bridgeserver: Bind to 127.0.0.1
Update scripts for working OpenH264

A patch was needed against the h264parse plugin to always put the
profile into caps so that the openh264dec plugin could work properly.
Only use entityReplace() on the parts of error messages that are external
Update scripts

This includes updating to the GStreamer 1.4 branch rather than using a
specific version. It also includes support for the iOS 8.1 and OS X
10.10 SDKs.