docker/machine — pull request #37 by sthulb (2014-12-07 11:49:00+00:00)
Title: adds `DIGITALOCEAN_ACCESS_TOKEN` env var isntead of passing argument

This is to satisfy part of #28.

The `DIGITALOCEAN_ACCESS_TOKEN` env var will be used if set. I'm not sure which other flags vars would benefit from being env vars other than perhaps `DIGITALOCEAN_REGION`