Fixing Chat shows icon with 0 messages even if there are no new messages
fix null pointer exception when user leaves
removed the hardcoded application DPI
fixed a null pointer exception when a user is in the audio conference, but not the user list
added empty methods to the PresentSO so it matches the server
changed the debug url back to the test-install server
Merge branch 'master' of https://github.com/bigbluebutton/bbb-air-client
Fixing bug when new user joins the meeting, bug with zero messages icon being shown
Merge pull request #5 from SenecaCDOT-BigBlueButton/chat-shows-zero-messages

Fixing Chat shows icon with 0 messages even if there are no new messages
fix an index out of bounds exception on the participants list
Merge branch 'master' of https://github.com/bigbluebutton/bbb-air-client
fixed null reference exceptions when retreiving a user in ListenerServiceSO