Localize maxspeed field (mph and km/h)

data/data_dev.js

@@ -13,7 +13,8 @@ iD.data = {
             path + 'data/presets/presets.json',
             path + 'data/presets/defaults.json',
             path + 'data/presets/categories.json',
-            path + 'data/presets/fields.json'
+            path + 'data/presets/fields.json',
+            path + 'data/imperial.json'
             ], d3.json, function (err, data) {
 
             iD.data = {
@@ -27,7 +28,8 @@ iD.data = {
                     defaults: data[6],
                     categories: data[7],
                     fields: data[8]
-                }
+                },
+                imperial: data[9]
             };
 
             callback();

data/presets/fields.json

@@ -198,7 +198,7 @@
     },
     "maxspeed": {
         "key": "maxspeed",
-        "type": "combo",
+        "type": "maxspeed",
         "label": "Speed Limit"
     },
     "name": {

data/presets/fields/maxspeed.json

@@ -1,5 +1,5 @@
 {
     "key": "maxspeed",
-    "type": "combo",
+    "type": "maxspeed",
     "label": "Speed Limit"
-}
+}

data/presets/schema/field.json

@@ -23,6 +23,7 @@
                 "combo",
                 "defaultcheck",
                 "text",
+                "maxspeed",
                 "number",
                 "tel",
                 "email",