This is the fourth and last milestone for the XWiki enterprise 2.0 version (Roadmap).
XWiki 2.0 introduces a new, lightweight, easily customizable skin. The main goal of the Colibri skin is to provide the proper support for fast and easy modifications of the look and feel of the wiki. The Colibri skin colors and decorative images are defined in ColorTheme objects inside Wiki documents, that can be changed directly in the web interface.
See How to setup a cluster of XWiki instance based on distributed events? to test it.
Each macro can now be added in a default category the macro author thinks appropriate. It's also possible to overwrite the macro category with configuration.
The macros categories are mainly used in WYSIWYG to make it easier to find the macros to use.