Normalize the heights of the logos (jennybc#115)

README.md

@@ -1,6 +1,5 @@
 Rendered product: <https://happygitwithr.com>
 
-[![TravisCI Build Status](https://travis-ci.org/jennybc/happy-git-with-r.svg?branch=master)](https://travis-ci.org/jennybc/happy-git-with-r)
-[![Netlify Deployments](https://www.netlify.com/img/global/badges/netlify-color-accent.svg)](https://app.netlify.com/sites/happygitwithr/deploys)
-
-<a rel="license" href="http://creativecommons.org/licenses/by-nc/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc/4.0/88x31.png" /></a>
+<a alt = "TravisCI Build Status" href="https://travis-ci.org/jennybc/happy-git-with-r"><img src="https://travis-ci.org/jennybc/happy-git-with-r.svg?branch=master" height = 20 /></a>
+<a alt = "Netlify Delopyments" href="https://app.netlify.com/sites/happygitwithr/deploys"><img src="https://www.netlify.com/img/global/badges/netlify-color-accent.svg" height = 20 /></a>
+<a rel="license" href="http://creativecommons.org/licenses/by-nc/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc/4.0/88x31.png" height = 20 /></a>