(feat) add alert to invited user and ability to join join
Merge pull request #40 from huyphamily/master

(feat) add alert to invited user and ability to join join
added handshake method to logic.js

Conflicts:
	Server/config/io.js
	app/components/WebRTC/logic.js
	app/components/client/scripts/directives.js
debugging signalling

Conflicts:
	Server/config/io.js
	app/components/client/scripts/directives.js
refactoring handshake
finish debuging handshake function. tested with 6 connects
all videos came up quickly