- book.module: + Added (1) support for "PHP pages" (dynamic pages), and (2) made it possible to link other node types into the book's tree/outline. It works just fine, yet the only (obvious) downside of (2) is that the navigation tree/links gets "interrupted" when you view non-book pages in the book. [SQL update required, see update.php] + Tidied up the book table. [SQL update required, see update.php] - various updates: + Fine-tuned the new node system. + Updated the inline/code documentation. + Improved teaser handling of all node types. + Made several small usability improvements to the node admin pages.