dropping of packets for slow connections in red5

 - hardcode poll result display position on server side so different clients won't have to recalculate
   position

remove the hardcoded poll whiteboard position

 - add more logging to determine who detects the disconnect first

Add num responders

Merge branch 'development' of https://github.com/bigbluebutton/bigbluebutton into add-num-responders

 - put message sender and recorders into actors to isolate meeting ac…

Remove poll button when the Polling Module isn't running

Improved .gitignore files with better patterns.

Fix issue 1964 - Meeting name label truncation

   will isolate the meeting actor from exceptions when sending to pusub and recording to redis

 - specify location of poll result display

 - store poll result into whiteboard history

Display poll result

Display poll result

Try to display poll result in whiteboard