Merge pull request #407 from SenecaCDOT-BigBlueButton/more-webrtc-fixes

bigbluebutton-client/locale/en_US/bbbResources.properties

bigbluebutton-client/resources/prod/lib/bbb_api_bridge.js

...button-client/resources/prod/lib/bbb_webrtc_bridge_sip.js

...nt/src/org/bigbluebutton/main/api/ExternalApiCallbacks.as

...ient/src/org/bigbluebutton/main/views/WebRTCEchoTest.mxml

...org/bigbluebutton/modules/phone/events/WebRTCCallEvent.as

...bigbluebutton/modules/phone/events/WebRTCEchoTestEvent.as

...bigbluebutton/modules/phone/managers/WebRTCCallManager.as

.../org/bigbluebutton/modules/phone/maps/WebRTCEventMap.mxml