README: Add license, minor revisions to match current version.
README: Add license, minor revisions to match current version.

mitro-co/keyczarjs,WeAreWizards/keyczarjs,schatt/keyczarjs,WeAreWizards/keyczarjs,WeAreWizards/keyczarjs,mitro-co/keyczarjs,schatt/keyczarjs,mitro-co/keyczarjs,schatt/keyczarjs