Use native Promises and drop "q" dependency, update streetside.js to es6

modules/svg/streetside.js

@@ -99,8 +99,8 @@ export function svgStreetside(projection, context, dispatch) {
 
         service
             .selectImage(d)
-            .then(function(r) {
-                if (r.status === 'ok'){
+            .then(response => {
+                if (response.status === 'ok'){
                     service.showViewer(_viewerYaw);
                 }
             });

package.json

@@ -51,7 +51,6 @@
     "node-diff3": "1.0.0",
     "osm-auth": "1.0.2",
     "pannellum": "2.4.1",
-    "q": "1.5.1",
     "rbush": "3.0.1",
     "string.fromcodepoint": "0.2.1",
     "which-polygon": "2.2.0",