fix(publisher): do not publish older app versions

As soon as a newer version of an application is published to etcd,
we should not be publishing any older application versions. This
prevents containers which are orphaned by fleet or systemd to be
exposed by the router.
ref(publisher): change package name to server
docs(managing_deis): flesh out platform monitoring docs
feat(*): Do not commit a local vagrant settings

This allows to customize vagrant using
https://github.com/coreos/coreos-vagrant/blob/master/config.rb.sample
Merge pull request #2413 from bacongobbler/1149-etcd-publish

fix(publisher): do not publish older app versions
Merge pull request #2433 from johanneswuerbach/configurable-vagrant

feat(*): Do not commit a local vagrant settings
Merge pull request #2441 from carmstrong/monitoring_docs

docs(managing_deis): flesh out platform monitoring docs
docs(*): flesh out platform logging docs; add logspout docs