Linked Resource MoveDeleteHook

Hello all,

I've been playing around a little with linked resources turned on, and
noticed a small problem when you try to delete a project and also delete
the contents. It appears to try to follow links. I don't know if it
actually deletes the stuff inside these links (It didn't delete a
readonly test file I had), but it still warns you that you are about to
delete readonly files.

The attached patch checks for liked resources first, and passes it back
to the normal move/delete. I'd attach it inline if it wasn't for outlook
would eat it, if it doesn't make it through I'll send it from another
address.

Kenny