Get testing on Travis CI

Author: fangohr

.travis.yml

@@ -0,0 +1,7 @@
+sudo: required
+
+services:
+  - docker
+
+script:
+  - make docker-all

Readme.md

@@ -1,5 +1,6 @@
 [![Binder](https://mybinder.org/badge.svg)](https://mybinder.org/v2/gh/fangohr/introduction-to-python-for-computational-science-and-engineering/master?filepath=index.ipynb)
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+[![Build Status](https://travis-ci.org/fangohr/introduction-to-python-for-computational-science-and-engineering.svg?branch=master)](https://travis-ci.org/fangohr/introduction-to-python-for-computational-science-and-engineering)
 
 # Introduction to Python for Computational Science and Engineering