[cloudformation] move ssl_cert_arn mapping to registry
[cloudformation] move environment parameter to registry
[cloudformation] use presence of launch configuration resource to guard insertion of elb dns into chef attributes
[cloudformation] add platform-elb template
[cloudformation] refactor platform elb wait into dynamic
[cloudformation] refactor platform for elb-as-stack and elb wait dynamic
Merge pull request #18 from signifyd/feature/elb-only-stack

Separate Platform application and ELB stacks