Load Google Maps on demand

package.json

@@ -19,6 +19,7 @@
     "iframe-resizer": "^3.5.5",
     "jquery": "^2.2.4",
     "jquery-lazy": "^1.7.4",
+    "load-google-maps-api": "^1.3.2",
     "moment": "^2.19.4",
     "normalize.css": "^7.0.0",
     "picturefill": "^3.0.2",