use suro file's lastModify/dateCreated time for build upload path

#140 

configuration:
        "prefixFormatter":{
            "type":"FileDate",
            "format":"yyyy/MM/dd/HH",
            "dateType":"lastModify or dateCreated" //default dateCreated
        },
I need a copyright

/*
 * Copyright 2014 Netflix, Inc.
 *
 *    Licensed 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.
 */