docs: beginnings of testimonials section

docs/ansible.rst

@@ -20,6 +20,22 @@ significant testing will prove the extension's soundness.
 .. _Bug reports: https://goo.gl/yLKZiJ
 
 
+Testimonials
+------------
+
+* "With mitogen **my playbook runtime went from 45 minutes to just under 3
+  minutes**. Awesome work!"
+
+* "Oh, performance improvement using Mitogen is *huge*. As mentioned before,
+  running with Mitogen enables takes 7m36 (give or take a few seconds). Without
+  Mitogen, the same run takes 19m49! **I'm not even deploying without Mitogen
+  anymore** :)"
+
+* "**Works like a charm**, thank you for your quick response"
+
+* "I tried it out. **He is not kidding about the speed increase**."
+
+
 Overview
 --------