update elements and fix some bugs

lib/src/firebase-element/firebase-document.html

Index: lib/src/firebase-element/firebase-document.html
diff --git a/lib/src/firebase-element/firebase-document.html b/lib/src/firebase-element/firebase-document.html
index de4739f60ed7a473cd38f41e0b4a0b09402852c2..ff2010db2cb0de40fa0bcf9415877777bf7f7171 100644
--- a/lib/src/firebase-element/firebase-document.html
+++ b/lib/src/firebase-element/firebase-document.html
@@ -64,7 +64,7 @@ document.
       'firebase-value': '_onFirebaseValue'
     },
 
-    _applyLocalDataChanges: function(change) {
+    _localDataChanged: function(change) {
       var pathFragments = change.path.split('.');
 
       if (pathFragments.length === 1) {
@@ -98,8 +98,10 @@ document.
     },
 
     _setRemoteDocumentChild: function(key, value) {
-      this._log('Setting child "' + key + '" to', value);
-      this.query.child(key).set(value);
+      this.debounce('set-' + key, function() {
+        this._log('Setting child "' + key + '" to', value);
+        this.query.child(key).set(value);
+      });
     },
 
     _removeRemoteDocumentChild: function(key) {