* AWS updates
* CloudFormation stack parameter for changing CloudFront tile cache TTL.
* S3 requests are always set as Requester Pays, enabling fetching from buckets in other accounts.
* Update CloudFormation template.
* Inline Lambda code into CloudFormation template.
read x-distribution-name header in TileJSON response if PUBLIC_HOSTNAME is not set.
* include both build-zip and build-cloudformation-stack in CI