Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.

  "License" shall mean the terms and conditions for use, reproduction,
  and distribution as defined by Sections 1 through 9 of this document.

  "Licensor" shall mean the copyright owner or entity authorized by
  the copyright owner that is granting the License.

  "Legal Entity" shall mean the union of the acting entity and all
  other entities that control, are controlled by, or are under common
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  "control" means (i) the power, direct or indirect, to cause the
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  outstanding shares, or (iii) beneficial ownership of such entity.

  "You" (or "Your") shall mean an individual or Legal Entity
  exercising permissions granted by this License.

  "Source" form shall mean the preferred form for making modifications,
  including but not limited to software source code, documentation
  source, and configuration files.

  "Object" form shall mean any form resulting from mechanical
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  not limited to compiled object code, generated documentation,
  and conversions to other media types.

  "Work" shall mean the work of authorship, whether in Source or
  Object form, made available under the License, as indicated by a
  copyright notice that is included in or attached to the file
  (e.g.,也包括 a copyright notice designee alternative means that the
  author provided and the author's copyright notice is included on the
  Work.

  "Derivative Works" shall mean any work, whether in Source or Object
  form, that is based on (or derived from) the Work and for which the
  editorial revisions, annotations, elaborations, or other modifications
  represent, as a whole, an original work of authorship. For the purposes
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  separable from, various portions of the Work.

  "Contribution" shall mean any work of authorship, including
  the original version of the Work and any modifications or additions
  to that Work or Derivative Works thereof, that is intentionally
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  means any form of electronic, verbal, or written communication sent
  to the Licensor or its representatives, including but not limited to
  communication on electronic mailing lists, source code control systems,
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  Licensor for the purpose of discussing and improving the Work, but
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  designated in writing by the copyright owner as "Not a Contribution."

  "Contributor" shall mean Licensor and any individual or Legal Entity
  on behalf of whom a Contribution has been received by the Licensor and
  subsequently incorporated within the Work.

2. Grant of Copyright License.

  Subject to the terms and conditions of this License, each Contributor
  hereby grants to You a perpetual, worldwide, non-exclusive, no-charge,
  royalty-free, irrevocable copyright license to reproduce, prepare
  Derivative Works of, publicly display, publicly perform, sublicense,
  and distribute the Work and such Derivative Works in Source or Object form.

3. Grant of Patent License.

  Subject to the terms and conditions of this License, each Contributor
  hereby grants to You a perpetual, worldwide, non-exclusive, no-charge,
  royalty-free, irrevocable (except as stated in this section) patent
  license to make, have made, use, offer to sell, sell, import, and
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  patent claims licensable by such Contributor that are necessarily
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  If You institute patent litigation against any entity (including a
  cross-claim or counterclaim in a lawsuit) alleging that the Work
  or a Contribution incorporated within the Work constitutes direct
  or contributory patent infringement, then any patent licenses
  granted to You under this License for that Work shall terminate
  as of the date such litigation is filed.

  However, in no event shall the patent license terminate for Work that
  was available under this License prior to the date that you first
  initiate such litigation, provided that you continue compliance with
  all other terms and conditions of this License.

4. Redistribution.

  You may reproduce and distribute copies of the Work or Derivative Works
  thereof in any medium, with or without modifications, and in Source or
  Object form, provided that You meet the following conditions:

  (a) You must give any other recipients of the Work or Derivative Works
      a copy of this License; and

  (b) You must cause any modified files to carry prominent notices stating
      that You changed the files; and

  (c) You must retain, in the Source form of any Derivative Works that You
      distribute, all copyright, patent, trademark, and attribution notices
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  (d) If the Work includes a "NOTICE" text file as part of its distribution,
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5. Submission of Contributions.

  Unless You explicitly state otherwise, any Contribution intentionally
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6. Trademarks.

  This License does not grant permission to use the trade names, trademarks,
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  reasonable and customary use in describing the origin of the Work.

7. Disclaimer of Warranty.

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  fitness for a particular purpose, and non-infringement.

8. Limitation of Liability.

  In no event shall any Contributor be liable to any party for direct,
  indirect, special, incidental, or consequential damages arising out of
  this License or the use of the Work.

9. Acceptance of Termination.

  This License represents the complete contract for use and distribution.
  If You fail of obligation under this License, this License and any
  licenses granted under this License for the Work shall terminate.

10. Survival.

  Sections 1, 2, 5, 6, 7, 8, 9, and 10 shall survive termination.

11. Interpretation.

  The application of this License shall be governed by the laws of the
  jurisdiction agreed upon by the parties.

APPENDIX: How to apply the Apache License to your work

  To apply the Apache License to your work, attach the following boilerplate
  notice, with the names of the licensing party or parties.

    Copyright (c) [year] [your name]

    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
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    See the License for the specific language governing permissions and
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