Merge branch 'master' into jgrpp

# Conflicts:
#	src/articulated_vehicles.cpp
#	src/articulated_vehicles.h
#	src/autoreplace_cmd.cpp
#	src/build_vehicle_gui.cpp
#	src/company_gui.cpp
#	src/core/format.hpp
#	src/genworld_gui.cpp
#	src/gfx.cpp
#	src/group_gui.cpp
#	src/linkgraph/linkgraph_gui.cpp
#	src/misc/endian_buffer.hpp
#	src/music/music_driver.hpp
#	src/newgrf_gui.cpp
#	src/rail_cmd.cpp
#	src/road_gui.cpp
#	src/settings_type.h
#	src/strgen/strgen.cpp
#	src/strings.cpp
#	src/timetable_cmd.cpp
#	src/town.h
#	src/vehicle.cpp
#	src/vehicle_gui.cpp
#	src/vehicle_gui_base.h
#	src/widget.cpp
#	src/widgets/dropdown.cpp
#	src/widgets/road_widget.h

src/road_type.h

@@ -16,6 +16,9 @@ extern uint32 _road_layout_change_counter;
 
 typedef uint32 RoadTypeLabel;
 
+static const RoadTypeLabel ROADTYPE_LABEL_ROAD = 'ROAD';
+static const RoadTypeLabel ROADTYPE_LABEL_TRAM = 'ELRL';
+
 /**
  * The different roadtypes we support
  *