Add a lightbox photo gallery with images students posted online

[mariobehling]

There are a lot of photos students posted online during the contest. Please add a Lightbox Bootstrap image gallery with those photos.

There is a gallery that we could use out of the box here maybe: https://github.com/blueimp/Gallery or propose another one.

• Ensure the photos can be opened in a lightbox
• If possible add a link to the original link when the lightbox is opened
• Add this section above the blog section.