=== 1.04: ===

 * ui, Application: Added UserStyles variable
 * Removed use of the init() function
 * CheckMark:getAttr() removed
 * Area:beginPopup() added
 * PopItem: now uses child:beginPopup() to prepare an element for being used
 in a popup
 * Widget:getPseudoClass() now gives hover precendece if the element is in a
 popup
 * Window:update() could try to relayout elements without a rectangle,
 corrected
 * Added some CSS documentation