Take a look at the External Resources tab in the JSFiddle you posted.
That example is loading four other external files besides jQuery:
image-picker.min.js
imagesloaded.pkgd.min.js
masonry.pkgd.min.js
image-picker.css
You will need to include those resources in your html as well:
<script src="http://rvera.github.io/image-picker/image-picker/image-picker.min.js"></script>
<script src="http://desandro.github.io/imagesloaded/imagesloaded.pkgd.min.js"></script>
<script src="http://masonry.desandro.com/masonry.pkgd.min.js"></script>
<link rel="stylesheet" href="http://rvera.github.io/image-picker/image-picker/image-picker.css" />