Written by Matt Bogosian <https://github.com/posita>.

The following individuals or entities have created and contributed
derivative works of this software. By adding your name to this list, you
transfer all title, license, and any other rights to your contributions to
this software to its owner. You further warrant and agree that: (1) your
contributions are exclusively your own creations and no one else has any
right or claim to them; (2) once accepted, your contributions become the
exclusive property of this software' owner and you retain no rights to
them; and (3) you indemnify and hold harmless this software's owner of
against any colorable claim of infringement by a third party for this
software's owner's otherwise lawful use of your contribution, whether or
not such use was contemplated by you at the time you made the
contribution.

Contributors:

* Roger Hoover <https://github.com/theduderog> (see <https://gist.github.com/theduderog/735556>)
* Terry Jones <http://blogs.fluidinfo.com/terry/about/> (see <http://blogs.fluidinfo.com/terry/2009/11/12/twisted-code-for-retrying-function-calls/>)
* <https://github.com/htoothrot> (see <https://gist.github.com/theduderog/735556>)
