It takes two file input elements, labeled Foreground and Background and combine them to make a final output Image.
Note: This is an assignment of "Programming Foundations with JavaScript, HTML and CSS" a course from Coursera provided by Duke Univerity.
It uses a SimpleImage() js library. The SimpleImage library can be found at: https://www.dukelearntoprogram.com/course1/common/js/image/SimpleImage.js
