launching-containers: move registry auth to separate doc
Refresh log debugging docs

This documents how to gzip all the logs before sending a support request
and how to tail all of the ER's web workers.
Remove piping to sh
Add information about tagging triggered builds.
Merge pull request #400 from jzelinskie/debug-er-logs

Refresh log debugging docs
Rewrite tagging paragraph, title-case other titles
cluster-management: add etcdctl env vars
running-coreos: note that python and pip are required for supernova
Merge pull request #405 from robszumski/etcdctl-env

cluster-management: add etcdctl env vars
Merge pull request #398 from robszumski/split-docker-auth

launching-containers: move registry auth to separate doc
Merge pull request #404 from jzelinskie/github-tagging

Add information about tagging triggered builds.