docs: optimize head section of templates Reordered the head section of website/www using capo.js to improve speed. Tried to do the same for the doc/_template/layout.html. Due to a bug in sphinx, we get duplicate viewport tags. https://github.com/sphinx-doc/sphinx/issues/11699 but I think it's harmless.

#! /bin/sh

# if there are multiple trackers, d=demo t=tracker ...
# returns last one for testing that server is up. Does not test
# each tracker.
tracker=$(ps -ef | sed -ne '/roundup-server/s/^.*\s\(\w*\)=.*$/\1/p')
wget -q -O /dev/null --proxy off --no-verbose http://localhost:8080/"${tracker:-demo}"/