[feature request] stack-verify functionality

gistfile1.txt

At work, we aim to use CloudFormation stacks for managing AWS Resources wherever possible.

Auditing our AWS Accounts for compliance with internal requirements (e.g. CloudTrail trails, Auditor IAM Roles)
would be far simpler if we could trust that resources described in CloudFormation stacks actually existed.

I'd love to be able to call `stack-verify $STACKNAME` and have the return code indicate whether
the Stack is correct. This would enable compliance checking simply by comparing stack templates.

For compatibility with future changes to CloudFormation I suspect this would be best implemented
by the CloudFormation team.