GvGen, the easy way to dot

This week, I was at pyconfr conference about python usage and development at Cités des sciences in Paris.

A talk about GvGen was presented by Sebastien Tricaud.

I discovered a library to create easily Graphviz dot files with good legend and I like it !

So, I decided to port it on FreeBSD operating system with this pr and finally it was commited by flz@ on ports tree and he add me on additional contributors list.

Thanks to flz@ for his birthday present.