parameter: no need for static Parameters class.
resource: promote CloudWatch to top-level class.
resource: promote CloudFront to top-level class.
resource: promote CloudTrail to top-level class.
resource: promote Logs to top-level class.
rough support for AWS::EC2::VPC.
rough support for AWS::EC2::Subnet.
rough support for AWS::EC2::InternetGateway.
rough support for AWS::EC2::VPNGateway.
rough support for AWS::EC2::VPCGatewayAttachment.