Need a license and updated contribution guidelines

Hello,

I'm Fil from Adobe's Open Source Office. We need to make sure every open source repo owned by Adobe has a proper license, copyright headers and contribution guidelines. This repo is missing a license as well as lacks the proper content in its contribution guidelines (there is no mention of the requirement to sign [Adobe's CLA](https://opensource.adobe.com/cla.html)).

@asancheza if this repo is still to be open and active, could you please submit an open sourcing request for this repo over at opensource.corp.adobe.com? If we no longer wish to maintain this repo, then we should remove it or archive it. If we do decide to archive it, we should still put in a license.