Added local storage for directories and generic file parser

spec/test_folder/gb18030-example.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="GB18030"?>
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<add>
+  <doc>
+    <field name="id">GB18030TEST</field>
+    <field name="name">Test with some GB18030 encoded characters</field>
+    <field name="features">No accents here</field>
+    <field name="features"><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></field>
+    <field name="features">This is a feature (translated)</field>
+    <field name="features"><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ǻ<EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD></field>
+    <field name="features">This document is very shiny (translated)</field>
+    <field name="price">0.0</field>
+    <field name="inStock">true</field>
+  </doc>
+</add>
+