ThinkPHP遵照Apache2开源协议宣布，并提供免费使用。
版权所有Copyright ? 2006-2016 by ThinkPHP (http://thinkphp.cn)
All rights reserved。
ThinkPHP? 商标和著作权所有者为上海顶想信息科技有限公司。

Apache Licence是著名的非盈利开源组织Apache接纳的协议。
该协媾和BSD类似，勉励代码共享和尊重原作者的著作权，
允许代码修改，再作为开源或商业软件宣布。需要知足
的条件：
1． 需要给代码的用户一份Apache Licence ；
2． 若是你修改了代码，需要在被修改的文件中说明；
3． 在延伸的代码中（修改和有源代码衍生的代码中）需要
带有原来代码中的协议，商标，专利声明和其他原来作者规
定需要包括的说明；
4． 若是再宣布的产品中包括一个Notice文件，则在Notice文
件中需要带有本协议内容。你可以在Notice中增添自己的
允许，但不可以体现为对Apache Licence组成更改。
详细的协议参考：http://www.apache.org/licenses/LICENSE-2.0

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