Create interface for nPoint controller.

[julesfowler]

Create a python interface for the nPoint controller.

Main steps :

• Make pyUSB bow to my will. (Also known as connect to the controller with pure python.)
• Proof of concept (literally able to hack this out and make it work.)
• Write a sensible scheme for checking commands have been set.
• Incorporate context managers.
• Incorporate logging.
• Polished software that's usable.
  --> Generalized interface with class inheritance for other controllers. This is moving to its own issue in #11 .

Bonus?

• Fix the double logging issue.
• Find a better way to restart the controller. (This may be impossible...)

[julesfowler]

This is being discussed and evolving towards polished in #2.