Added more checks to bbb-conf & set esl.host=127.0.0.1 in bigbluebutton.properites so we don't need to assign an IP address for red5 to connect to freeswitch

 - convert pixels from int[] to byte[] and use the byte[] to calculate checksum to determine if a block has chnaged

 - start freeswitch or asterisk depending on what's configured in red5/bigbluebutton/WEB-INF/red5-web.xml

 - handle rolling over of sequence number. Sequence is only 16-bits (65535) and can start at any number so it
   can rollover if the audio stream is too long.

 - init last seq num and last timestamp from first packet received. Don't assume that seq num always start at 0.