Test via TravisCI.

.travis.yml

@@ -0,0 +1,19 @@
+language: python
+dist: xenial
+python:
+    - 2.7
+    - 3.6
+    - 3.7
+before_install:
+    - pip install -U setuptools pip
+    - pip install -U coverage coveralls zope.testrunner
+install:
+    - pip install -U -e .[test]
+script:
+    - coverage run -m zope.testrunner --test-path=src --all -v1
+notifications:
+    email: false
+after_success:
+    - coveralls
+cache:
+  pip: true