[Haskell] Announce: GraphViz: Change of Maintainer

[Matthew Sackman]

I no longer have the time to continue development of the (apparently,
judging from the number of emails I'm getting, rather popular) graphviz
package. Fortunately, Ivan Lazar Miljenovic who has extended it himself
and sent me patches (some of which I did get round to folding in) has
agreed to take on the package. Please direct all further queries to him!

Many thanks Ivan!

Matthew