Fixed Typographical scale
So this is why they don't let amateurs create OSS projects ;-)
I've setup the typographical scale here wrong the whole time. This blog post was very helpful in setting me straight:
http://spencermortensen.com/articles/typographic-scale/
Basically what I've learned and corrected this project to use is that the h1 should be the baseFontSize multiplied by the modular scale. And that the classic "scale" is the Octave or 2. Whereas previously I'd just eyeballed the multipliers for the various headers, they're now in line with the theory in the above article. See this and this commits for the details.
How to update
If you just used the default modular scale, then there's little to do. I've updated the default modular scale now to octave which with the new code, results in similar typography to the previous diminished fourth.
If you did set your own modular scale(s), you'll need to try larger ones until you restore the previous behavior.
Also I changed the default font-family for headers (e9d0bb4). If you want to restore that font-family stack, add this to your config headerFontFamily: '"Avenir Next", "Helvetica Neue", "Segoe UI", Helvetica, Arial, sans-serif'