Upgrades to Susy 2, cleanup.
The thing, it changes.
Wraps author image with a span.
Fixes notice for getting property of undefined.

The custom field for person_user_id is sometimes, somehow, set to -1, so this is
a quick fix to just check if we have a valid user ID. Eventually need to look
into how this fields gets set to -1 in the first place, and prevent it.
Removes unused template files.
Moves archives listings to sidebar template.
Markup housekeeping.
Some positive direction on layout.
Display author name always; display author bio only on single posts.
Color, layout, and typography tweekin'
Style improvement on comments.
Updates markup and file for logo.
Some style reorganization, typography improvements.
Ongoing stuff for header images.
Removes obsolete files.
Adds way to use rgba for background color on post headers.
Makes site banner somewhat workable.
Adjusting spacing around banner.

Removes all the top padding on the page header until I can figure out something
better for this.
More tweaking.
Lighter color overlay on header.