Allow users to specify a class for each way

This adds the ability to mark ways with a user-defined
class in the profile. This class information will be included
in the response as property of the RouteStep object.

features/support/route.js

@@ -260,6 +260,10 @@ module.exports = function () {
         return this.extractInstructionList(instructions, s => s.mode);
     };
 
+    this.classesList = (instructions) => {
+        return this.extractInstructionList(instructions, s => s.classes ? s.classes.join(';') : '');
+    };
+
     this.timeList = (instructions) => {
         return this.extractInstructionList(instructions, s => s.duration + 's');
     };

features/support/shared_steps.js

@@ -34,7 +34,7 @@ module.exports = function () {
                 var afterRequest = (err, res, body) => {
                     if (err) return cb(err);
                     if (body && body.length) {
-                        let destinations, exits, pronunciations, instructions, refs, bearings, turns, modes, times,
+                        let destinations, exits, pronunciations, instructions, refs, bearings, turns, modes, times, classes,
                             distances, summary, intersections, lanes, locations, annotation, weight_name, weights, approaches;
 
                         let json = JSON.parse(body);
@@ -53,6 +53,7 @@ module.exports = function () {
                             turns = this.turnList(json.routes[0]);
                             intersections = this.intersectionList(json.routes[0]);
                             modes = this.modeList(json.routes[0]);
+                            classes = this.classesList(json.routes[0]);
                             times = this.timeList(json.routes[0]);
                             distances = this.distanceList(json.routes[0]);
                             lanes = this.lanesList(json.routes[0]);
@@ -174,6 +175,7 @@ module.exports = function () {
                         putValue('bearing', bearings);
                         putValue('turns', turns);
                         putValue('modes', modes);
+                        putValue('classes', classes);
                         putValue('times', times);
                         putValue('distances', distances);
                         putValue('pronunciations', pronunciations);