------
* mock_s3 and mocks3bucket_path are now the same thing. The server decides
which interface to is being used based on the request Host header. We will
evetually deprecate mocks3bucket_path.
* Basic ECS support
* More Dynamo querying and indexes
* Add Kinesis and ELB tags
* Add JSON responses for EMR
* Fix root instance volume to show up in other EBS volume calls