GIF tool: copyright and permission notices

GIF processing uses gifuct-js and the GIF encoder from gifenc. Color reduction is implemented by this site; gifenc's PnnQuant quantizer is not included in the shipped worker.

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gifenc 1.0.3
https://github.com/mattdesl/gifenc

The MIT License (MIT)
Copyright (c) 2017 Matt DesLauriers

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
OR OTHER DEALINGS IN THE SOFTWARE.

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gifuct-js 2.1.2
https://github.com/matt-way/gifuct-js

The MIT License (MIT)

Copyright (c) 2015 Matt Way

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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js-binary-schema-parser 2.0.3
https://github.com/matt-way/jsBinarySchemaParser

The MIT License (MIT)

Copyright (c) 2015 Matt Way

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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Additional upstream attribution (gifenc/src/lzwEncode.js)
/*
  LZWEncoder.js
  Authors
  Kevin Weiner (original Java version - kweiner@fmsware.com)
  Thibault Imbert (AS3 version - bytearray.org)
  Johan Nordberg (JS version - code@johan-nordberg.com)
  Acknowledgements
  GIFCOMPR.C - GIF Image compression routines
  Lempel-Ziv compression based on 'compress'. GIF modifications by
  David Rowley (mgardi@watdcsu.waterloo.edu)
  GIF Image compression - modified 'compress'
  Based on: compress.c - File compression ala IEEE Computer, June 1984.
  By Authors: Spencer W. Thomas (decvax!harpo!utah-cs!utah-gr!thomas)
  Jim McKie (decvax!mcvax!jim)
  Steve Davies (decvax!vax135!petsd!peora!srd)
  Ken Turkowski (decvax!decwrl!turtlevax!ken)
  James A. Woods (decvax!ihnp4!ames!jaw)
  Joe Orost (decvax!vax135!petsd!joe)
  Matt DesLauriers (@mattdesl - V8/JS optimizations)
  Mathieu Henri (@p01 - JS optimization)
*/

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Additional upstream attribution (gifuct-js/src/lzw.js)
/**
 * javascript port of java LZW decompression
 * Original java author url: https://gist.github.com/devunwired/4479231
 */

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Additional upstream attribution (gifuct-js/src/deinterlace.js)
/**
 * Deinterlace function from https://github.com/shachaf/jsgif
 */