New year, new look!

I've tweaked the theme for the site a bit and much prefer it to the original jekyll-clean theme on which it is based. Hopefully it's an improvement, drop me a message if you disagree...

There's still a few bits I'm unhappy with. In particular the dark-on-light code blocks probably want replacing with a proper Solarized Dark theming but I've not had time to do that yet. Once it's polished up and I'm happy with it I'll publish the theme for anyone else who's interested to take a look at and re-use.