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 control with that entity. For the purposes of this
definition, "control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or otherwise, or (ii)
ownership of fifty percent (50%) or more of the 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 transformation or translation of a Source form, including but 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 work (an example is
provided in the Appendix below).

      "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 of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of, the Work
and Derivative Works thereof.

      "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
submitted to Licensor for inclusion in the Work by the copyright owner or by an
individual or Legal Entity authorized to submit on behalf of the copyright owner.
For the purposes of this definition, "submitted" 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, and issue tracking systems that are managed by, or on
behalf of, the Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise 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 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
    otherwise transfer the Work, where such license applies only to those patent
    claims licensable by such Contributor that are necessarily infringed by their
    Contribution(s) alone or by combination of their Contribution(s) with the Work to
    which such Contribution(s) was submitted. 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.

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 from
    the Source form of the Work, excluding those notices that do not pertain to any
    part of the Derivative Works; and

          (d) If the Work includes a "NOTICE" text

    file as part of its distribution, then any Derivative Works that You distribute
    must include a readable copy of the attribution notices contained within such
    NOTICE file, excluding those notices that do not pertain to any part of the
    Derivative Works, in at least one of the following places: within a NOTICE text
    file distributed as part of the Derivative Works; within the Source form or
    documentation, if provided along with the Derivative Works; or, within a display
    generated by the Derivative Works, if and wherever such third-party notices
    normally appear. The contents of the NOTICE file are for informational purposes
    only and do not modify the License. You may add Your own attribution notices
    within Derivative Works that You distribute, alongside or as an addendum to the
    NOTICE text from the Work, provided that such additional attribution notices
    cannot be construed as modifying the License.

          You may add Your own

    copyright statement to Your modifications and may provide additional or different
    license terms and conditions for use, reproduction, or distribution of Your
    modifications, or for any such Derivative Works as a whole, provided Your use,
    reproduction, and distribution of the Work otherwise complies with the conditions
    stated in this License.

5.  Submission of Contributions. Unless You explicitly
    state otherwise, any Contribution intentionally submitted for inclusion in the
    Work by You to the Licensor shall be under the terms and conditions of this
    License, without any additional terms or conditions. Notwithstanding the above,
    nothing herein shall supersede or modify the terms of any separate license
    agreement you may have executed with Licensor regarding such Contributions.

6.  Trademarks. This License does not grant permission to use the trade names,
    trademarks, service marks, or product names of the Licensor, except as required
    for reasonable and customary use in describing the origin of the Work and
    reproducing the content of the NOTICE file.
    7.  Disclaimer of Warranty. Unless
        required by applicable law or agreed to in writing, Licensor provides the Work
        (and each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT
        WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including,
        without limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT,
        MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are solely responsible
        for determining the appropriateness of using or redistributing the Work and
        assume any risks associated with Your exercise of permissions under this
        License.

    8.  Limitation of Liability. In no event and under no legal theory,
        whether in tort (including negligence), contract, or otherwise, unless required
        by applicable law (such as deliberate and grossly negligent acts) or agreed to in
        writing, shall any Contributor be liable to You for damages, including any
        direct, indirect, special, incidental, or consequential damages of any character
        arising as a result of this License or out of the use or inability to use the
        Work (including but not limited to damages for loss of goodwill, work stoppage,
        computer failure or malfunction, or any and all other commercial damages or
        losses), even if such Contributor has been advised of the possibility of such
        damages.

    9.  Accepting Warranty or Additional Liability. While redistributing
        the Work or Derivative Works thereof, You may choose to offer, and charge a fee
        for, acceptance of support, warranty, indemnity, or other liability obligations
        and/or rights consistent with this License. However, in accepting such
        obligations, You may act only on Your own behalf and on Your sole responsibility,
        not on behalf of any other Contributor, and only if You agree to indemnify,
        defend, and hold each Contributor harmless for any liability incurred by, or
        claims asserted against, such Contributor by reason of your accepting any such
        warranty or additional liability. END OF TERMS AND CONDITIONS

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 fields enclosed by brackets
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Copyright [yyyy] qianxun

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.
