Add text mentioning that this applies to gnome.org cvs.

This is mozilla's modified version of the libart source code. The original 

code can be found in the gnome.org cvs repository.

The below notice appears in the gnome.org cvs tree. It isn't a requirement

to submitting a patch to this directory that people assign copyright.  

However, you should be aware of the below if you want your changes to be

accepted into the official libart release. We strongly encourage all

submitted patches (except, obviously, for mozilla-specific build hacks) to

be sent to the maintainer. We don't want to fork the code, but we do want

and need patches so that, for example, SVG can work on the mac.

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Welcome to the libart source tree!

This code is being developed in a "free software for sale"