add part of video chat to modal window
video tag deleting works, but modal window doesn`t reconnect to channel after closing
add MultiRTC.js
removed console.log from drag_and_drop.js and fixed pusher/stat/ error
Merge branch 'develop' of github.com:SBS-team/chaaat into develop
Merge branch 'video_chat_modal' into develop

Conflicts:
	app/assets/javascripts/application.js
	app/assets/javascripts/messages.coffee
	app/assets/stylesheets/users.css.scss