Add destroyMachines to ECS
Merge branch 'develop' into mv-delete-container

Avoid conflicts down the line.
Disallow deleting the 'root container' token.
Clean up uses of forEach
Fix and add additional tests.
Merge pull request #434 from makyo/mv-delete-container

Add destroy machine to the ECS and deployer bar

This branch adds destroy machine/container functionality to the ECS and the deployer bar, including deleting queued addMachine records.