Update to WebIDL checker

Hi,

Just a quick note that I have update the on-line WebIDL checker [1] to
take into account some of the changes in the WebIDL spec, in particular:
* support for the Array syntax
* support for DOMString constants and stricter check of allowed types
for constants

(this is done through a patch to widlproc; I'm hoping to get it
integrated upstream [2], but I'm attaching a copy of my patch just in
case)

Dom

1. http://www.w3.org/2009/07/webidl-check
2. http://widl.webvm.net/