fix(makefile): delete missing files on rsync

fixes problems seen while working with schema migrations
fix(controller/registry): strip hostname from repo

The changes to the registry module did not strip the hostname from the
app image. This fixes that by properly parsing the source for the
repository name in the registry and the tag.
Merge pull request #1500 from deis/hotfix-registry-module

fix(controller/registry): strip hostname from repo
docs(*): make OpDemand the maintainer

OpDemand collectively maintains the images. It's a group effort :)
fix(tests): allow env vars to override important test settings
refactor(tests): update test expectations and get suite passing
docs(tests): update README.md with integration test setup
Merge pull request #1501 from deis/opdemand-maintainer

docs(*): make OpDemand the maintainer
fix(contrib/digitalocean) fix region check

Fix the allowed region checks.
This used to only allow 4 (New York 2), and not any of the others.
Merge pull request #1503 from nathansamson/do-fix

fix(contrib/digitalocean) fix region check
Merge pull request #1492 from deis/fix-rsync-delete

fix(makefile): delete missing files on rsync
style(controller): flake8
Merge pull request #1497 from deis/integration-test-fixes

fix(tests): integration improvements and documentation
docs(README): typo - `ram`
fix(controller): Determine registry address during start

Before this change re-deploying apps failed when the registry was
re-scheduled to a different instance in the cluster.

Fixes #1128
Merge pull request #1508 from deis/flake8-fixes

style(controller): flake8
Merge pull request #1325 from johanneswuerbach/moving-registry

fix(controller): Determine registry address during start