readme: add Wilson as core contributor

Author: jcarpent

README.md

@@ -81,6 +81,7 @@ The following people have been involved in the development of **EigenPy**:
 - [Wolfgang Merkt](http://www.wolfgangmerkt.com/) (University of Edinburgh): ROS integration and support
 - [Sean Yen](https://www.linkedin.com/in/seanyentw) (Microsoft): Windows integration
 - [Loïc Estève](https://github.com/lesteve) (INRIA): Conda integration
+- [Wilson Jallet](https://manifoldfr.github.io/) (INRIA/LAAS-CNRS): core developer
 
 If you have taken part to the development of **EigenPy**, feel free to add your name and contribution here.