Use new Travis infra and run against latest stable Node
Use new Travis infra and run against latest stable Node

See [here](http://docs.travis-ci.com/user/migrating-from-legacy) for details on the new Travis infrastructure.

As a sanity check, we should run the CI tests against latest stable Node, especially as they move to a faster release cycle.
EECOLOR/firebase-queue,FirebaseExtended/firebase-queue