Add AMIV statutes as a submodule

We could add the current AMIV statutes as a git submodule and include the newest version from the master automatically when its updated.

I am not sure if this is possible since updating submodules requires manual interaction to my knowledge. But it would make it easier to update the statutes. No developer/board member has to manually install texlive/pandoc and create the html sources. This could be done either in webpack or in the Dockerfile