Improve formatting for blog readability

[Frijol]

There are some oddities of text width, spacing, and maybe font size that make our blog a bit hard to read. It would be very nice to have someone take a look at/tweak these!

I'd be happy to help/implement if someone with more design chops could take a look and call out what needs changing!

[Frijol]

Just noticed that this has some urgency! Specifically, we don't have any styling applied to blockquote text. We use this formatting to call out quotations from the text. Without the styling, they look like they're just something somebody said within the blogged conversation.

Looks like:

Should look like (or something):