chore(*): remove deis-builder-data
Merge pull request #105 from carmstrong/remove_builder_data

chore(*): remove deis-builder-data
fix(*): Announce the published port to etcd

Builder listens on 22 (internal) and is published on 2223
chore(*): Rename PUBLISH to EXTERNAL_PORT

This makes the boot logic more understandable. This commit also fixes
some wrong comments, about what is published and what is checked.