[graph-tool] Tiago's brithday

Ni! I'd like to point out that this dude is answering bugs on this mailing list on his birthday, and even that is just a tiny demonstration of how awesome he is. (Though I suspect his girlfriend doesn't really understand why =D) Happy birthday Tiago! May your life be integer, your happiness double, your networks fully connected, and your property maps full of treasure =) Hugs, ale .~´