fix(publisher): do not publish older app versions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.
chore(*): update CoreOS to 494.0.0

See https://github.com/coreos/manifest/releases/tag/v494.0.0
ref(publisher): change package name to server
Merge pull request #2432 from mboersma/coreos-494

chore(*): update CoreOS to 494.0.0
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fix(publisher): do not publish older app versions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
Merge pull request #2442 from carmstrong/logging_docs

docs(*): flesh out platform logging docs; add logspout docs
docs(test_plan): add a formal doc describing QA strategy & scope
docs(using-deis): add missing sections on limits and tags
docs(installing_deis): add quick start guide

This guide adds some quick links to some common tasks that are shared
across multiple cloud provider documentation such as generating a new
SSH key, generating a Discovery URL, configuring DNS and installing
deisctl.
fix(docs): fixup markdown
Merge pull request #2449 from gabrtv/add-using-deis-docs

docs(using-deis): add missing sections on limits and tags
docs(understanding_deis): refactor architecture, concepts, components
Merge pull request #2448 from mboersma/test-plan-doc

docs(test_plan): add a formal doc describing QA strategy & scope
Merge pull request #2447 from bacongobbler/2446-ssh-key-docs

docs(installing_deis): add quick start guide
Merge pull request #2450 from gabrtv/understanding-deis

docs(understanding_deis): refactor architecture, concepts, components