Merge pull request convox#341 from convox/stack-prefixes

Stack Prefixes

update CI readme to remove node-workers buckets too

ci stack name back to convox-123

hash is rack:app:process

balancer name is trunc(app-process)-hash(rack-app-process). more tests

balancer name is trunc(app-process)-hash(rack-app-process). more tests

vendor compiled cfssl binary

remove unused metrics model

Merge pull request convox#375 from goodeggs/rack

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fixes #362

move environment