DOC Add solido testimonial

Fixes scikit-learn#3668.

Author: amueller

doc/testimonials/images/solido_logo.png

@@ -602,6 +602,38 @@ Scikit-learn in one word: Awesome.
 
 Rafael Carrascosa, Lead developer
 
+
+`solido <http://www.solidodesign.com/>`_
+-----------------------------------------
+
+.. raw:: html
+
+   <div class="logo">
+
+.. image:: images/solido_logo.png
+   :target: http://www.solidodesign.com
+
+.. raw:: html
+
+   </div>
+
+Scikit-learn is helping to drive Moore’s Law, via Solido. Solido creates
+computer-aided design tools used by the majority of top-20 semiconductor
+companies and fabs, to design the bleeding-edge chips inside smartphones,
+automobiles, and more. Scikit-learn helps to power Solido’s algorithms for
+rare-event estimation, worst-case verification, optimization, and more. At
+Solido, we are particularly fond of scikit-learn’s libraries for Gaussian
+Process models, large-scale regularized linear regression, and classification.
+Scikit-learn has increased our productivity, because for many ML problems we no
+longer need to “roll our own” code. `This PyData 2014 talk <https://www.youtube.com/watch?v=Jm-eBD9xR3w>`_ has details.
+
+
+.. raw:: html
+
+  <span class="testimonial-author">
+
+Trent McConaghy, founder, Solido Design Automation Inc.
+
 .. raw:: html
 
   </span>