Introduce all classes needed for creating real qx.ui.toolbar.ToolBars. This includes qx.ui.toolbar.ToolBars, qx.ui.toolbar.ToolBarParts, qx.ui.toolbar.Separator and qx.ui.toolbar.ToolBarButtons.

The qx.ui.toolbar.ToolBarButtons and QxRadioButtons in this example are beautifully decoupled by "global" qx.event.type.DataEvent.