update elements and fix some bugs

lib/src/firebase-element/firebase-query-behavior.html

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 @license
 Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
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@@ skipping 22 matching lines @@
         readOnly: true
       },
 
       /**
        * If true, verbose debugging information will be printed to the console.
        */
       log: {
         type: Boolean,
         value: false,
         reflectToAttribute: true
-      },
-
-      _receivingRemoteChanges: {
-        type: Boolean,
-        value: false
       }
     },
 
     observers: [
       '_dataChanged(data.*)'
     ],
 
+    created: function() {
+      this._receivingLocalChanges = false;
+      this._receivingRemoteChanges = false;
+    },
+
     get dataAsObject() {
       if (Array.isArray(this.data)) {
         return this.data.reduce(function(object, value, index) {
           object[index] = value;
         }, {});
       }
 
       return this.data;
     },
 
     /**
      * Disconnects the current Firebase Query instance.
      */
     disconnect: function() {
       this.location = '';
     },
 
-    _applyLocalDataChanges: function(changes) {
+    _localDataChanged: function(changes) {
       // Virtual..
     },
 
+    _applyLocalDataChange: function(applyChange) {
+      this._receivingLocalChanges = true;
+      applyChange.call(this);
+      this._receivingLocalChanges = false;
+    },
+
     _applyRemoteDataChange: function(applyChange) {
-      if (this._applyingLocalDataChanges) {
-        return;
-      }
       this._receivingRemoteChanges = true;
       applyChange.call(this);
       this._receivingRemoteChanges = false;
     },
 
     _dataChanged: function(changes) {
-      if (this._receivingRemoteChanges) {
+      if (this._receivingRemoteChanges ||
+          this._receivingLocalChanges) {
         return;
       }
 
-      this._applyingLocalDataChanges = true;
-      this._applyLocalDataChanges(changes);
-      this._applyingLocalDataChanges = false;
+      this._localDataChanged(changes);
     },
 
     _queryChanged: function(query, oldQuery) {
       if (oldQuery) {
         this._stopListeningToQuery(oldQuery);
       }
 
       if (query) {
         this._listenToQuery(query);
       }
@@ skipping 71 matching lines @@
             return arg.val();
           }
 
           return arg;
         });
 
         console.log.apply(console, args);
       }
     },
 
+    _warn: function() {
+      if (this.log) {
+        Polymer.Base._warn(this._logf.apply(this, arguments));
+      }
+    },
+
     _error: function() {
       if (this.log) {
-        console.error.apply(console, arguments);
+        Polymer.Base._error(this._logf.apply(this, arguments));
       }
     }
   };
 </script>