fix(makefile): delete missing files on rsync

fixes problems seen while working with schema migrations
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 #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
feat(controller): add endpoint and infrastructure for limiting memory/cpu
feat(client): add commands for managing memory/cpu limits