--- /dev/null
+## zlib v1.2.11
+
+### zlib License
+<pre>
+
+Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+
+Jean-loup Gailly Mark Adler
+jloup@gzip.org madler@alumni.caltech.edu
+
+</pre>