* 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
c44c8b06a4