Guard angulargmDefaults in a function so it only gets run if AngularGM is loaded.

Author: dylanfprice

src/module.js

@@ -42,15 +42,17 @@
    * });
    * ```
    */
-  value('angulargmDefaults', {
-    'precision': 3,
-    'markerConstructor': google.maps.Marker,
-    'polylineConstructor': google.maps.Polyline,
-    'mapOptions': {
-      zoom : 8,
-      center : new google.maps.LatLng(46, -120),
-      mapTypeId : google.maps.MapTypeId.ROADMAP
-    }
+  factory('angulargmDefaults', function() {
+    return {
+      'precision': 3,
+      'markerConstructor': google.maps.Marker,
+      'polylineConstructor': google.maps.Polyline,
+      'mapOptions': {
+        zoom : 8,
+        center : new google.maps.LatLng(46, -120),
+        mapTypeId : google.maps.MapTypeId.ROADMAP
+      }
+    };
   });
 
 })();