added video call demo page
Merge branch 'peerjs-integration' of https://github.com/denisstepanenko/nci-aria-project into peerjs-integration

Conflicts:
	Chatter/Scripts/app/app.js
Merge pull request #14 from denisstepanenko/peerjs-integration

added video call demo page
added the logic to remove friends
started adding the video functionality to the chat window
video/audio call working, needs polishing...
polishing the video UI
added error messaages