[view/DE,bugfix][xs]: use (rather than overwrite!) passed in config options.

src/view.js

@@ -76,11 +76,11 @@ my.DataExplorer = Backbone.View.extend({
   initialize: function(options) {
     var self = this;
     this.el = $(this.el);
-    this.config = options.config || {};
+    this.config = _.extend({
-    _.extend(this.config, {
         displayCount: 10
         , readOnly: false
-    });
+      },
+      options.config);
     if (this.config.readOnly) {
       this.setReadOnly();
     }