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 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 "[]" replaced with your own identifying
 information. (Don't include the brackets!)  The text should be enclosed in
 the appropriate comment syntax for the file format. We also recommend that
 a file or class name and description of purpose be included on the same "printed
 page" as the copyright notice for easier identification within third-party
 archives.
 
 Copyright [yyyy] [name of copyright owner]
 
 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.