* replaced previously removed concepts/containers and concepts/introcution by a redirect * moved orphan index/varable to workingwiththerepository * added favicon to the layout.html * added redirect_home which is a http refresh redirect. It works like a 301 for google * fixed an issue in the layout that would make it break when on small screens Upstream-commit: 3491d7d2f11246ba4067708a3c5336ba21da4767 Component: engine