* refactor code.

src/js/boards.js

@@ -67,14 +67,12 @@
     Boards.prototype.bind = function(items) {
         var $boards = this.$,
             setting = this.options;
-        if(typeof(items) == 'undefined') {
-            items = $boards.find('.board-item:not(".disable-drop, .board-item-shadow")');
-        }
 
-        items.droppable($.extend({
+        $boards.droppable($.extend({
             before: setting.before,
             target: '.board-item:not(".disable-drop, .board-item-shadow")',
             flex: true,
+            selector: '.board-item:not(".disable-drop, .board-item-shadow")',
             start: function(e) {
                 $boards.addClass('dragging').find('.board-item-shadow').height(e.element.outerHeight());
             },

src/js/dashboard.js

@@ -124,7 +124,7 @@
                 }, 100);
             }
 
-            $(document).bind('mousemove', mouseMove).bind('mouseup', mouseUp);
+            $(document).on('mousemove', mouseMove).on('mouseup', mouseUp);
             event.preventDefault();
 
             function mouseMove(event) {
@@ -225,7 +225,7 @@
                 dashboard.find('.panel-dragging').removeClass('panel-dragging');
                 row.find('.dragging-in').removeClass('dragging-in');
                 dashboard.removeClass('dashboard-dragging');
-                $(document).unbind('mousemove', mouseMove).unbind('mouseup', mouseUp);
+                $(document).off('mousemove', mouseMove).off('mouseup', mouseUp);
                 event.preventDefault();
             }
         });