Add ECS regional endpoints
Initial commit; Create Cluster and DeregisterContainerInstance endpoints and tests
Lowercase the test responses; Add DeregisterTaskDefinition method and tests
Add DescribeClusters, DescribeContainerInstances and DescribeTaskDefition and tests
Add DescribeTasks and DiscoverPollEndpoint methods and tests
Add ListClusters, ListContainerInstances, ListTaskDefinitions and ListTasks methods and tests
Add RegisterContainerInstance and RegisterTaskDefinition methods and tests
Add RunTask, StartTask, StopTask methods and tests
Add SubmitContainerStateChange and SubmitTaskStateChange methods and tests
Clean up
Merge pull request #53 from boyand/ecs

ECS Support