changed webrtc error messages to errorcodes, fixed a bug with webrtc call failing at echo test
Merge pull request #407 from SenecaCDOT-BigBlueButton/more-webrtc-fixes

WebRTC fixes
 - cleanup
 - fix txt uri for accessibility
 - start implementing auto start recording
 - fix https://code.google.com/p/bigbluebutton/issues/detail?id=1776
 - allow start/stop recording when doing autostarting recording
 - follow redirects when downloading presentation
 - modify lib path
Merge pull request #409 from SenecaCDOT-BigBlueButton/bigbluebutton-client-system-check-app

initial commit for client check app
Merge branch 'master' into follow-download-url-redirect
initial commit for client check app
adding gitignore, removing files that are not required
clearing more files that are not required and additional paramaters to gitignore
modifying build.xml to copy custom BBBClientCheck.html file, adding additional value to gitignore
 - don't let viewers mute/unmute others through the webcam window
 - new signed applet valid until oct 30, 2015
 - fix https://code.google.com/p/bigbluebutton/issues/detail?id=1804
 - fix https://code.google.com/p/bigbluebutton/issues/detail?id=1692
Merge pull request #410 from SenecaCDOT-BigBlueButton/bigbluebutton-client-system-check-app

modifying build.xml to copy custom BBBClientCheck.html file, adding addi...