Add support for several EWMH atoms.  Patch from @bbidulock

The following atoms are now supported:
   _NET_WM_ACTION_FULLSCREEN
   _NET_WM_PID
   _NET_WM_VISIBLE_NAME
   _NET_WM_ICON_NAME
   _NET_WM_VIISIBLE_ICON_NAME
   _NET_WM_WINDOW_TYPE_MENU
   _NET_WM_WINDOW_TYPE_NOTIFICATION
   _NET_WM_WINDOW_TYPE_TOOLBAR
   _NET_WM_WINDOW_TYPE_UTILITY