- Generalized tree generation: new classes for unfied tree generation
and rendering in xowiki for categories, table-of contents,
book-views with/without ajax, etc.
- For all trees, different renderers can be used. Examples:
* plain HTML list renderer
* mktree renderer
* yuitree renderer
* HTML section structure renderer
Some renderer are more powerful then others. All renderes use
the same interface and can be easily improved, subclassed, etc.
- The new YUItree renderer is based now on progressive enhancement.
This improves accessibiliy of e.g. category trees in xowiki.
