Support for new "StepScaling" policies

[benyamindfring]

recently AWS released an addition for Auto-Scaling policies, called "StepScaling" policies.

this is the announcement:
https://aws.amazon.com/blogs/aws/auto-scaling-update-new-scaling-policies-for-more-responsive-scaling/

also you can refer to "PolicyType" in the link below.
http://docs.aws.amazon.com/AutoScaling/latest/APIReference/API_PutScalingPolicy.html

unfortunately Asgard doesn't seem to recognize this type of scaling policies, and thus doesn't allow to copy ASG's with it.

2015-07-13_07:46:42 Exception: com.amazonaws.AmazonServiceException: Status Code: 400, AWS Service: AmazonAutoScaling, AWS Request ID: 4d9d671e-2933-11e5-aa35-bb4a085a0cba, AWS Error Code: ValidationError, AWS Error Message: Scaling increment must be specified for a SimpleScaling policy