The instructions for installing via Weave Cloud were rather out of
date, and in any case are embedded in Weave Cloud itself, so there is
no point repeating them here.

This has been tested on OpenShift Orgin v1.4.1 (`oc cluster up --version=v1.4.1 --skip-registry-check`),
(using latest builds of `oc` [412b5d6] command and Docker for Mac [v17.06.0-rc5-ce-mac16]).

Jekyll doesn't tolerate this, and it's generally cosidered a cleaner
style, we've had a bit of mixed style and this makes it consistent.