config-vpc.json.example: updated example parameters to match the actual parameters
cloudformation-template-vpc.json: simplify Outputs, add jump box EIP
cloudformation-template-vpc.json: added scale up and down policies, still need to add CloudWatch alarms to trigger them
config-vpc.json.example: added AutoScaleCooldown to example
Merge branch 'master' of https://github.com/philcryer/stax