Some files may be removed from this directory to save space, if
needed.
*The default theme must always be present,* even when using another
theme! Wherever a theme has no specific variant (override) of a
template or button or image, PhpWiki will look for one in the default 
theme. Same with the language: 
Language and theme specific specific buttons will be search in 
sub-directories like <theme>/buttons/en, and if none will be found, 
the default buttons, which might be language-independent, in default/buttons 
will be used.

List of current themes:
* default
* blog
* Crao
* fusionforge (extends wikilens, can be used only with Fusionforge)
* Hawaiian
* MacOSX
* MonoBook (extends wikilens)
* Portland
* shamino_com
* Sidebar (extends MonoBook)
* smaller
* SpaceWiki
* wikilens
* Wordpress

See doc/THEMES for more info on PhpWiki themes.

TODO:
Make it easier to add design templates such as these:
  http://www.oswd.org/viewdesign.phtml?id=1739&referer=%2Fmost_popular.phtml
Use the plugin->box method for the right and left boxes.