Include licensing document

[adamsheridan]

From GitHub's Licensing page:

You're under no obligation to choose a license. However, without a license, the default copyright laws apply, meaning that you retain all rights to your source code and no one may reproduce, distribute, or create derivative works from your work. If you're creating an open source project, we strongly encourage you to include an open source license. The Open Source Guide provides additional guidance on choosing the correct license for your project.

Please can you include your intentional licensing requirements for this repo so other users know if they can create derivative works and/or reproduce techniques defined here.