* new themes
* rework of overal structure
* add expirydate to posts
* width of maincontent sometimes flows over nav-column, depending on definition of font-size (pt in stead of px?) Got to find a good size-defenition - frankma
* when plugin has controlpanel, then automatically go to that panel after activating the plugin
* extend table _themes, so more colors and fonts can be added (e.g. menu title, text links, menu links)