Issue 207: RTCIceCandidateComplete dictionary

Opened by Robin Raymond:
https://github.com/openpeer/ortc/issues/207

Testing for an empty object is not straight forward in JavaScript. It would be easier to add a name / value pairing like this when stringified:

{ "complete": true }

So we should have complete in the RTCIceCandidateComplete dictionary which is mandatory and set to true.

Sample code please (in RTCIceGatherer)...