Bind Webcam and WebRTC video stream to CallInterface

Add working mute and webcam on/off buttons.
Add rudimentary start webrtc call functionnality. This is only a first step, it will be improved in the future.

GitLab: #74
Change-Id: Ic3afde596a60fa2e9ea6199e3d632366078ec9fe
diff --git a/routes/fakeServerForWebRTC.js b/routes/fakeServerForWebRTC.js
index 1e4bd4f..e672f8a 100644
--- a/routes/fakeServerForWebRTC.js
+++ b/routes/fakeServerForWebRTC.js
@@ -33,7 +33,7 @@
 
 const io = new Server(server, {
   cors: {
-    origin: 'http://localhost:8080',
+    origin: '*',
   },
 });