Adadomain merged to sphinx-contrib
I merged my Adadomain to sphinx-contrib. This way it is one step more official extension.
For those who do not know: Sphinx is a documentation tool and it is used in Ahven. In release 1.9 of Ahven, I included the generated HTML documentation to the tarball, but I might emit the generated content from 2.0 since the Adadomain extension is now merged.