Add support for syntax highlighting

[KrauseFx]

Code blocks currently don't support syntax highlighting, however that's something that's rather easy to add. For a minimalistic stylesheet we could take the styles from krausefx.com/css.

There are many libraries that support syntax highlighting to HTML, some even come with nice stylesheets. We gotta find one that's similar to GitHub

[FarazPatankar]

Thoughts on using Prism for the syntax highlighting?

[KrauseFx]

I have no preferences, as long as it's plain simple, well maintained and works well

[FarazPatankar]

I believe it ticks all the boxes. I am going to try and send a PR your way soon.

[KrauseFx]

Cool, thanks, and yah looks like it's MIT licensed 👍 https://github.com/PrismJS/prism/blob/master/LICENSE

[KrauseFx]

Working on this now