Use ci to compile and run tests?

Author: dengwirda

.travis.yml

@@ -0,0 +1,24 @@
+language: python
+python:
+  - 3.6
+  - 3.7
+  - 3.8
+  
+os: linux
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - gcc-8
+      - g++-8
+
+script:
+  - export CC=gcc-8
+  - export CXX=g++-8
+  - python3 setup.py build_external
+  - python3 setup.py install
+  - python3 example.py --IDnumber=0
+  - python3 example.py --IDnumber=1
+  - python3 example.py --IDnumber=2
+  - python3 example.py --IDnumber=3