For category archive that have child categories, show basic list of sub-categories instead of post list.
Add category images, using plugin.
Format sub-post listing in a similar way to post listings.
Remove pagination for sub-category listing category archive pages.
Rewrite breadcrumbs on category pages to show category hierarchy correctly. Fixes #9.
Fix minor formatting issue that causes errors in older PHP installations.
Show empty categories and hide sub-sub-categories from main listing.
Merge pull request #8 from sarahsemark/category-listings

This allows categories with parent relationships to display sub-categories instead of posts on their archive pages. (Am merging to master now in order to clean repo.)