Moving Towards ndm-2.0, Based on Discussions at NodeConf

* rather than an ndm stanza, there is now an environment stanza (as-per @groundwater and my discussions at NodeConf).
  * the environment stanza can include `args` or `env`.
* the `scripts` tag from package.json is now used rather than bins:
  * `start` is is used as the entry point for service wrappers.
  * `ndm run-script foo` can now be used to execute scripts with the env and args in service.json.