* Removing minor version requirements for nodes; this means that new node
  releases have the potential to break autorequire, however unlikely.
* Given that module.js has been stable for a good amount of time now, and
  that node versions rev so frequently, I'm switching policy.
* Introducing a testedEngines field into package.json that indicates which
  nodes have been tested (and get run by test-all)

See #2 for a discussion about this (and me flip-flopping on the issue).