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 the Licensor designates as "Original
   Work".
   "Derivative Works" shall mean any work, whether in Source or Object
   form, that is based upon 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
   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 an electronic
   mailing list, source code control system, and issue tracking system
   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 the
   Contributor that are necessarily infringed by their Contribution
   alone or by combination of their Contribution with the Work to which
   such Contribution 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 a copy of this License;
   (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 that do not pertain to any part of the Derivative
       Works.

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 with the 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, the
   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.

8. Limitation of Liability.
   In no event and under no legal theory, whether in tort (including
   negligence), contract, or otherwise, shall any Contributor be
   liable to You for any indirect, special, incidental, or consequential
   damages of any character including, without limitation, damages for
   loss of goodwill, work stoppage, computer failure or malfunction, or
   any and all other damages or losses arising out of or related to the
   use of the Work.

9. Accepting the License.
   By copying, modifying, or distributing the Work, you indicate your
   acceptance of this License.

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.  For example:

   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.

   For attribution, retain this notice and include a reference to the
   original repository (e.g., https://github.com/uejsh/orchestra) in
   your documentation.
