Use correct headings everywhere

Pages should start with h1 and work down from there in order. For now I
left all of the styling as the default Boostrap styling, but we may
decide that a lot of it is too big. Thankfully, we should be able to
easily configure this by setting variables like:

  $font-size-h2

Change-Id: Ia91c6ddd7675b02c8d7e8acc3f49c33e8b9c91a0
Remove unused static_pages stylesheet

This file is empty except for an auto-generated comment. Removing it to
keep things slim.

Change-Id: I510ce630190ebf38def9bda6227c02d7cf19225e