Merge branch 'merge-polling-with-master' of github.com:antobinary/bigbluebutton into have-server-send-data-when-user-joins

   prevent memory leaks

public chat messages are displayed, emitted, received...; right now each chat message is displayed twice (both in the flash and html5 clients).

Merge branch 'merge-polling-with-master' of https://github.com/bigbluebutton/bigbluebutton into merge-polling-with-master

Merge branch 'merge-polling-with-master' of github.com:antobinary/bigbluebutton into merge-polling-with-master

get_chat_history, get_chat_history_reply. The history should be displaying properly but I should first fix sending a chat message. Otherwise the history will remain empty

Merge branch 'implement-lock-settings' of https://github.com/bigbluebutton/bigbluebutton into merge-polling-with-master

get_users_request + reply ... the array of users is empty for now, I wonder if it will contain users if my user is not the only one in the meeting