Merge pull request fffaraz#732 from stillwater-sc/universal

adding universal numbers library

README.md

@@ -560,8 +560,8 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 * [Vc](https://github.com/VcDevel/Vc) - SIMD Vector Classes for C++. [BSD]
 * [Versor](http://versor.mat.ucsb.edu/) - A (fast) Generic C++ library for Geometric Algebras, including Euclidean, Projective, Conformal, Spacetime (etc).
 * [Wykobi](http://www.wykobi.com/) - A C++ library of efficient, robust and simple to use C++ 2D/3D oriented computational geometry routines. [MIT]
-* [xtensor](https://github.com/QuantStack/xtensor) - A C++14 library for numerical analysis with multi-dimensional
-array expressions, inspired by NumPy syntax. [BSD 3-clause] [website](http://quantstack.net/xtensor)
+* [xtensor](https://github.com/QuantStack/xtensor) - A C++14 library for numerical analysis with multi-dimensional array expressions, inspired by NumPy syntax. [BSD 3-clause] [website](http://quantstack.net/xtensor)
+* [universal](https://github.com/stillwater-sc/universal) - A C++14 header-only library implementing arbitrary posit arithmetic. The posit number system is a tapered floating point that is more efficient than IEEE floating point. Posits enable reproducible computational science. [MIT license] [website](http://www.stillwater-sc.com/assets/content/stillwater-universal-sw.html)
 
 ## Memory Allocation