Syntax Highlighting Theme Changes

UGH. So after changing the theme once before, I still wasn't happy with it and it was really driving me nuts. This new theme is custom, but also based on the Spacegray Theme colors. Looks way nicer.

Other Fixes

• Updated code blocks in some posts
• Changed CSS code sample in styleguide.md to better reflect the CSS written on the site.

Feed Improvements

I was inspired by looking at this and wanted to use some variables for the feed. Also, updating to use https.

Changed Syntax Highlighting Theme

The previous syntax highlighting theme felt out of place in the design. I've decided to go with something much more subtle.

Changing Typeface Site Wide

We've moved over to the wonderful Whitney from Hoefler & Co. It's a beautiful typeface that reads very well and aligns better with the personality of the site.