initial nested stack approach /issue #119
Fix parameter AvailabilityZone default /issue #119
Add parameter InstanceType allowed values constraint /issue #119
Add parameter DisableApiTermination /issue #119
Compose TemplateURLs from parameters /issue #119
Simplify TemplateURL composition via single parameters /issue #119
Merge pull request #136 from cityindex/aws-nested-stacks-s3-composition

Compose TemplateURLs from parameters
add boolean AllowedValues
instance memory estimates for elasticsearch heap size
rename AlarmTopic => AlarmTopicArn
make instance types parameterized
add secondary cidr range; rename
configure kibana on es-ebs nodes as well
create a simpler example cloudformation
fix json syntax; fix ephemeral es using ephemeral mnt
Merge pull request #135 from cityindex/aws-nested-stacks

Nested AWS CloudFormation Stack Approach