add maxwidth as optional field to roads and ferry routes (closes #518)

* affected highway types:
  * service
  * living_street
  * unclassified/residential
  * primary/secondary/tertiary + *_links
  * tunk + trunk_link
  * motorway + motorway_link
* ferry route: https://wiki.openstreetmap.org/wiki/Tag:route=ferry

data/presets/highway/living_street.json

@@ -17,6 +17,7 @@
         "lit",
         "maxheight",
         "maxweight_bridge",
+        "maxwidth",
         "oneway/bicycle",
         "smoothness",
         "trolley_wire",

data/presets/highway/motorway.json

@@ -19,6 +19,7 @@
         "maxheight",
         "maxspeed/advisory",
         "maxweight_bridge",
+        "maxwidth",
         "minspeed",
         "not/name",
         "smoothness",

data/presets/highway/motorway_link-US-CA.json

@@ -22,6 +22,7 @@
         "maxheight",
         "maxspeed",
         "maxweight_bridge",
+        "maxwidth",
         "ref_road_number",
         "smoothness",
         "toll",

data/presets/highway/motorway_link.json

@@ -22,6 +22,7 @@
         "maxheight",
         "maxspeed/advisory",
         "maxweight_bridge",
+        "maxwidth",
         "ref_road_number",
         "smoothness",
         "toll",

data/presets/highway/primary.json

@@ -23,6 +23,7 @@
         "maxheight",
         "maxspeed/advisory",
         "maxweight_bridge",
+        "maxwidth",
         "not/name",
         "oneway/bicycle",
         "smoothness",

data/presets/highway/primary_link-US-CA.json

@@ -24,6 +24,7 @@
         "maxheight",
         "maxspeed",
         "maxweight_bridge",
+        "maxwidth",
         "oneway/bicycle",
         "ref_road_number",
         "smoothness",

data/presets/highway/primary_link.json

@@ -24,6 +24,7 @@
         "maxheight",
         "maxspeed/advisory",
         "maxweight_bridge",
+        "maxwidth",
         "oneway/bicycle",
         "ref_road_number",
         "smoothness",

data/presets/highway/residential.json

@@ -20,6 +20,7 @@
         "maxheight",
         "maxspeed/advisory",
         "maxweight_bridge",
+        "maxwidth",
         "not/name",
         "oneway/bicycle",
         "smoothness",

data/presets/highway/service.json

@@ -18,6 +18,7 @@
         "maxheight",
         "maxspeed/advisory",
         "maxweight_bridge",
+        "maxwidth",
         "oneway/bicycle",
         "smoothness",
         "trolley_wire",

data/presets/highway/trunk.json

@@ -20,6 +20,7 @@
         "maxheight",
         "maxspeed/advisory",
         "maxweight_bridge",
+        "maxwidth",
         "minspeed",
         "not/name",
         "smoothness",

data/presets/route/ferry.json

@@ -20,6 +20,7 @@
         "interval",
         "maxheight",
         "maxweight",
+        "maxwidth",
         "network",
         "oneway",
         "opening_hours",