Speed support in build config

build-config.json

{
	speeds:{
		units:"km/h",
		values:{
			"highway=motorway": 130,
			"highway=motorway_link": 100,
			"highway=trunk": 110,
			"highway=trunk_link": 100,
			"highway=primary": 90,
			"highway=primary_link": 90,
			"highway=secondary": 50,
			"highway=secondary_link": 40,
			"highway=tertiary": 40,
			"highway=tertiary_link": 40,
			"highway=living_street": 10,
			"highway=pedestrian": 5,
			"highway=residential": 50,
			"highway=unclassified": 40,
			"highway=service": 25,
			"highway=track": 16,
			"highway=road": 40
		},
		"defaultSpeed":40
	}
}