Proposed CloudFormation custom resource interface for DynamoDB AutoScaler Resource

example-ddb-scaler.json

"MyDynamoAutoScaler": {
  "Type": "Custom::DynamoDBAutoScaling",
  "Properties": {
    "TableName": {"Ref": "MyDynamoTable"},
    "CheckInterval": 300,

    "ScaleReadsUpAbove": 90,
    "IncreaseReadsBy": 50,

    "ScaleReadsDownBelow": 30,
    "DecreaseReadsBy": 40,

    "ScaleReadsUpAbove": 90,
    "IncreaseWritesBy": 40,

    "ScaleReadsDownBelow": 40,
    "DecreaseWritesBy": 70
  }
}