revisit empty lines; revisit visibility of class members; remove empty destructor; clean up
improve propertyeditor; revert implicit variant interface of enumproperty to explicit one
because:
* variants are not meant to be used like that
* explicit is faster and less error prone (compile time checks)
revisit booleditor and coloreditor
Revise remaining editors
update PropertyModel's class comment
Move property editor paint code to respective classes; cleanup PropertyPainter
add PropertyPainterPlugin
add PropertyEditorPlugin and PropertyPainterPlugin
Adapt PropertyBrowser and PropertyDelegate to new Plugin concept
Remove affixes from propertypainter code; move to floatingpointeditor owns paint method
Add affixes to (Un)SignedIntegralEditors; add to supported options
Update propertyguiexample
add add*Plugin() template methods
Merge pull request #98 from hpicgs/propertyguizeug_cleanup

Propertyguizeug cleanup