New release 1.0-beta6

[phpfreechat]

This release is a big step in phpfreechat life, it fixes lot of major bugs and add lot of great features. Here is a quick summary :

* No more blank screen on IE6!
* Window title notification when new messages are posted
* Container refactoring, it make easier to write new containers (only 3 methodes to write: setMeta, getMeta and rmMeta)
* Optimize CPU and diskspace (thanks to the container refactoring)
* Two new commands /version and /help