PATCH: use uris in all nautilus-link operations

[Alex Graveley <alex ximian com>]

Hi,

http://primates.ximian.com/~alex/desktop-links-use-uris.diff

This patch replaces the use of file paths with URIs for all
nautilus-*-link operations.  This is needed because menu editing
requires non-file:// URIs to be used when creating or editing launchers.

Ok to commit?

-Alex

P.S. - This is a resend as the patch is above the 40k limit for this
list.  Admins, please disregard prior mails.

-- 
"I don't find excessive sanity a virtue."