Minor changes

Hi Jean-Nicolas,

I've just started using Mootools as I've recently been given the task of updating some code on a heavily hacked Joomla 1.5 installation. I like MooDataTable as (despite being a newbie to mootools) its code is very readable and understandable.

Anyhow, while playing with the demo files, I made a few minor changes that I thought you might like to use. (Apologies about the removal of trailing whitespace cluttering the diffs. My editor is configured to strip all trailing whitespace automatically on save).

Best regards,
Anthony