Add Licence Support for Package

[devinmatte]

Allow the user to point towards a license section, like the spec: https://docs.npmjs.com/files/package.json#license

Add support for adding licence when using the -p flag.

[nrebhun]

Hey @devinmatte
mind if I give this one a shot?

[devinmatte]

@nrebhun Go for it! Ask any questions you may have in this thread.