Added blocking whenReady to Base to ensure app is configured before sending a native call

Author: auser

ios/Firestack/FirestackCloudMessaging.h

@@ -17,6 +17,6 @@
 
 }
 
-+ (void) setup;
++ (void) setup:(UIApplication *)application;
 
 @end

lib/modules/analytics.js

@@ -19,7 +19,7 @@ export class Analytics extends Base {
    * @return {Promise}
    */
   logEventWithName(name, props) {
-    return promisify('logEventWithName', FirestackAnalytics)(name, props);
+    return this.whenReady(promisify('logEventWithName', FirestackAnalytics)(name, props))
   }
 
   enable() {

lib/modules/base.js

@@ -41,6 +41,10 @@ export class Base {
     return this.firestack.app;
   }
 
+  whenReady(fn) {
+    return this.firestack.configurePromise.then(fn);
+  }
+
   get namespace() {
     return 'firestack:base';
   }