Another site update. There are several minor changes, and one big one: comment posting. It's pretty basic for now; as the site evolves new capabilities will be added.

Changelog

• R197 Refactored ArticleIdController and ArticlePermalinkController to have a common base class.
• R200 Added images for comment links.
• R201 CSS changes for comment links.
• R202 Database update for comment features.
• R203 Added Comment domain objects.
• R204 Comment system implemented.