Fixed messages to display previous messages from before join, display greeting, then display new messages accordingly

Merge branch 'meteor-merge-private-chat' of https://github.com/antobinary/bigbluebutton into prototype-metor-client

the client will have access only to the meeting they are in so they can see the meeting"s name and record status

Merge branch 'meteor-merge-private-chat' of https://github.com/antobinary/bigbluebutton into prototype-metor-client

Merge branch 'prototype-metor-client' of github.com:perroned/bigbluebutton into meteor-merge-private-chat

Conflicts:
	labs/meteor-client/client/globals.coffee
	labs/meteor-client/client/views/chat/chat_bar.coffee
	labs/meteor-client/collections/collections.coffee
	labs/meteor-client/lib/router.coffee
	labs/meteor-client/server/publish.coffee
	labs/meteor-client/server/server.coffee

stop sending userName and meetingName via the URL. Now we can obtain them from bbb-apps and the Collections