building documentation

[dbu]

in order to be able to successfully run bin/generate-docs.sh i had to install texlive-latex-extra on my ubuntu machine. otherwise i get

build/pdf/sphinx.sty: File `fancybox.sty' not found.
build/pdf/sphinx.sty:14: Emergency stop.
build/pdf/sphinx.sty:14: leading text: \RequirePackage

and another package i had to install is texlive-fonts-recommended - not sure if this is ubuntu specific or if it can go into bin/install-dependencies.sh. even if its specific, might be worth to mention it in the readme