HTML5 audio!

I banned flash out of this fork…finally!
How it works? Easy. I've overwritten the loadSounds method in chat.js
and have made it to automatically pre-load a sound into the object.
Each propertory is now named sound_1 to sound_6. Under that, you find
an array(10) where we buffer the sound at most ten times. When the chat
requests the play of a sound, we loop thru that array and check for a
playable sound, and play it.
We also support all browsers - mp3 and wav. However, I didnt convert
the mp3 files yet. Some browsers can also do mp3 which makes things a
little smaller. So I recon you make wav-files just in case a browser
does NOT support mp3 - the chat will then fall back to wav.
Also, renamed socket to socketServer just to make things look a bit
more clean.