Even more LoneSeek improvements.

While our teacher explained the inner workings of Oracle 10g today, I made some improvements. And I introduced so many new features! Like joining a chatroom (it now works), and storing all users of the chatroom in a list. There is also code for sending/retrieving chat messages and leaving a chatroom behind the scenes, though they lack a public method. By the way, I also found out how to read the tickers of a room; I have updated my protocol documentation with a section explaining how to get the tickers for a room. Last but not least: My source code is in the BerliOS SVN repository.