Fixed bugs in the way the server was stopping. LoginRequest tests now work
Merge branch 'master' of ssh://athena.dialup.mit.edu/afs/athena.mit.edu/course/6/6.005/git/sp13/projects/guichat/alvarom-aybose-holliman
Added tests for joining and leaving a room
Create two new request objects: SendMessageRequest and GetUsersInRoomRequest. Modified ChatSession to send all of those requests. Also adjusted the server visitor interface.