Added Google Maps layers. Improved key load

package-lock.json

@@ -4723,6 +4723,11 @@
         "pinkie-promise": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz"
       }
     },
+    "google-maps": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/google-maps/-/google-maps-3.2.1.tgz",
+      "integrity": "sha1-wHWPKxdaSo0RDBq7H8TMOMEXbgY="
+    },
     "graceful-fs": {
       "version": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.11.tgz",
       "integrity": "sha1-Dovf5NHduIVNZOBOp8AOKgJuVlg="
@@ -9945,6 +9950,11 @@
         "prop-types": "15.6.0"
       }
     },
+    "react-leaflet-google": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/react-leaflet-google/-/react-leaflet-google-3.2.0.tgz",
+      "integrity": "sha1-67F5qBIOQ0Ui0GK8eTdojKLtD20="
+    },
     "react-overlays": {
       "version": "0.7.4",
       "resolved": "https://registry.npmjs.org/react-overlays/-/react-overlays-0.7.4.tgz",