Automation for adding routes for new articles/slides

[dyc3]

It's kind of a pain to edit the router manually to add a new article or slideshow.

Potential solutions:

• move article metadata (path and document title) to the articles themselves, have a build script to produce routes
• read the structure of the articles folder, and generate routes based on that.

Both of these solutions will require a modification to the build pipeline, which is currently managed by create-react-app. In order to implement this, we will probably have to npm run eject.