added KDE NET WM support

 - full support for _KDE_NET_SYSTEM_TRAY_WINDOWS
 - full support for _KDE_NET_WM_FRAME_STRUT
 - full support for _KDE_NET_WM_SYSTEM_TRAY_WINDOW_FOR
 - full support for _KDE_NET_WM_WINDOW_TYPE_OVERRIDE
 - full support for _KDE_SPLASH_PROGRESS
 - full support fro _KDE_WM_CHANGE_STATE

 - support for WindowMaker dockapps