Getting the portfolio section ready for an enlarged screen
Adjusting portfolio thumbs

Setting breakpoints to be 768, 1024 and 1280px and adding some animation
magic to the figcaptions. Also wrapping the images in anchors.
Boilerplate JavaScript with some DOM tools
JS: add 'closest' method
Enlarge images nicely
Tweak screens so captions are shown under 1280px

Landscape iPads, etc, looked dodgy otherwise
Close, nav buttons
Temporary: hide nav buttons

Lots of effort right now, not immediately worth it
Mobile: hide full screen view
Merge pull request #17 from willmorgan/pulls/images

Image enlargement code