Add a license file

[mikelococo]

There's no explicit license file for this cookbook. Decide what license to use and add one.

[mikelococo]

@wtreur Do you have any interest or concern about me adding a license to this cookbook?

http://choosealicense.com/licenses/ has a nice bullet summary of the main points of various OSS licenses. I'm relavitely flexible, and my personal inclination is to put it under the MIT license which allows almost any use (including commercial) and requires almost nothing in return (notably it doesn't require sharing changes).

[wtreur]

Thanks for involving me in this :) I am familiar with the MIT license and it sounds fine to me. No objections from my side.