switching travis badges to svg

Author: dfm

README.rst

@@ -181,7 +181,7 @@ Sponsors
 
 .. |Binder| image:: https://mybinder.org/badge.svg
    :target: https://mybinder.org/v2/gh/pymc-devs/pymc3/master?filepath=%2Fdocs%2Fsource%2Fnotebooks
-.. |Build Status| image:: https://travis-ci.org/pymc-devs/pymc3.png?branch=master
+.. |Build Status| image:: https://travis-ci.org/pymc-devs/pymc3.svg?branch=master
    :target: https://travis-ci.org/pymc-devs/pymc3
 .. |Coverage| image:: https://coveralls.io/repos/github/pymc-devs/pymc3/badge.svg?branch=master
    :target: https://coveralls.io/github/pymc-devs/pymc3?branch=master

docs/source/semantic_sphinx/layout.html

@@ -76,7 +76,7 @@ <h2>Probabilistic Programming in Python</h2>
             <img src="https://mybinder.org/badge.svg">
         </a>
         <a class="ui image" href="https://travis-ci.org/pymc-devs/pymc3">
-            <img src="https://travis-ci.org/pymc-devs/pymc3.png?branch=master">
+            <img src="https://travis-ci.org/pymc-devs/pymc3.svg?branch=master">
         </a>
         <a class="ui image" href="https://coveralls.io/github/pymc-devs/pymc3?branch=master">
             <img src="https://coveralls.io/repos/github/pymc-devs/pymc3/badge.svg?branch=master">