Copyright and attributions

 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.   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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.  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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.