[cairo] Maintaining cairo with git (a note on git-mv)

[mental at rydia.net]

Quoting Carl Worth <cworth at cworth.org>:

> I still don't see any convenience in git for removing a file and
> noting that in the index. Obviously, it's possible to do it, but
> the commands are a bit cumbersome:
>
> 	rm some-file
> 	git update-index --remove some-file

Personally I would use Cogito and cg-rm.  While it's certainly
possible to use git by hand, the intent was that other software
like Cogito would provide the "porcelain".

-mental