EPD-190: added IIntendedRouteLayerCommonSettingsObserver and implemented IntendedRouteLayerCommonSettings
EPD-190: Added Javadoc descriptions of the different settings found in GUISettings (EPD Ship)
EPD-190: Javadoc for IGUISettingsObserver
EPD-190: Added IENCLayerCommonSettingsObserver
EPD-190: Implemented ENCLayerCommonSettings