Uniform api for createuser

Author: EddyVerbruggen

firebase.android.js

@@ -745,7 +745,7 @@ firebase.createUser = function (arg) {
               reject("Creating a user failed. " + (task.getException() && task.getException().getReason ? task.getException().getReason() : task.getException()));
             } else {
               var user = task.getResult().getUser();
-              resolve(toLoginResult(user));
+              resolve({key: user.getUid()});
             }
           }
         });

firebase.ios.js

@@ -791,7 +791,7 @@ firebase.createUser = function (arg) {
           reject(error.localizedDescription);
         } else {
           resolve({
-            key: user.uid // firebase.toJsObject(authData).uid
+            key: user.uid
           });
         }
       };