Add a License

[mridgway]

There doesn't seem to be any license information for this repository/package. It is unusable without a license.

[mbrukman]

@elbart — any update on this?

Per GitHub docs on licensing:

Generally speaking, the absence of a license means that the default copyright laws apply. This means that you retain all rights to your source code and that nobody else may reproduce, distribute, or create derivative works from your work. This might not be what you intend.

Thanks!