/* 
 * Copyright (C) 2017-present gexiangying
 * All rights reserved.
 *
 * gexiangying grants to you a limited, non-transferable and non-exclusive right to use, royalty-free, copy and redistribute the software.
 *
 * The licensee has the right to use the software for a non-profit projects/sites. There are no 
 * limitations on the number of non-profit   *projects/sites you can use the software in, you can
 * use it on any number of non-profit projects/sites you need. There is no time limit, you can
 * use the software for any period of time you need. There is no restriction while you are 
 * developing your solution. There are no royalties  of any kind involved.
 *
 * The governmental entities are not allowed to use this freeware license.
 *
 * The licensee is allowed to copy and redistribute the software but you may not:
 * a) Distribute the modified software or part(s) of it as a standalone application.
 * b) Sublicense, rent, lease or lend any portion of the software as a standalone application.
 * c) Modify or remove any copyright notices from any of the software files.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */