G49 third-party notices

Pinned upstream project README Complete notices

G49
Upstream: https://github.com/mapbox/polyline
Commit: 5e797bf9cdf46db94bc3290b0e4d39e6db5a51c9
Archive SHA256: 9782a66e87083c3bd70d0493547078df18ab8aefc0dcd3bb9501307a497c5992

Copyright (c), Development Seed  
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Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this
  list of conditions and the following disclaimer in the documentation and/or
  other materials provided with the distribution.
- Neither the name "Development Seed" nor the names of its contributors may be
  used to endorse or promote products derived from this software without
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