Resize header text on small screens.

...and a couple of other minor adjustments.
Show bottom nav at all times.
Thinner chars on blog titles.
No need for this darker grey for meta text.
No need for these fonts.
Page h3s same as blog post h3s.
Make page h2 look the same as post h2.
Favicon.
Don't include subtitle in title if no page title.

Yeeaahh.