added copyright to js
added copyright to js

actorapp/jsOnlyLightbox,actorapp/jsOnlyLightbox,mohan43u/jsOnlyLightbox,olegshilov/jsOnlyLightbox,mohan43u/jsOnlyLightbox,felixhagspiel/jsOnlyLightbox,felixhagspiel/jsOnlyLightbox,olegshilov/jsOnlyLightbox