fix header for CDN distro

I'd like to host this on the [jsDelivr  CDN](http://www.jsdelivr.com/), but needs a version & license since we host only OSS.  (Feel free to fill in your own files.)
v1.0.0 would be more accurate according to [SemVer](http://semver.org/).  You're public, & it works great.  If you make API changes later, then that would be v2.0.0.
Added the MIT License.