1. complete seller chat interface
2. change Evnet model design
temp commit
temp commit
1 add ReplyView
2 enable fetch replies using ReplyView
1 implement asynchronous message sending function (draw message box in
chat room while waiting for sync, then draw the datetime right after the
message be written into the database)
1 remove unnecessary codes
2 avoid using #message and #msgbtn in chatroomView
1 complete long-polling test function
1 complete automatic-event-updating system
2 add a function testEvent() for testing. A test event for the current
login user will be generated immediately when a post request be sent to
accounts/addevents
3 add 'test' as a eventType in database
temp
Merge branch 'W15B-2' into develop

Conflicts:
	accounts/admin.py
	djangotest/templates/index.html