Refs #5537: Updated logos and teaser images.
Refs #5537: Removed old project content and separated new project cards into individual partials.
Refs #5537:  Assorted style updates.
Refs #5537:  Created preliminary Work page.  For now, it simply includes the same Work section that's rendered on the home page.
Refs #5537:  Added sample card for Car Talk and preliminary markup/styles for "secondary" project links.