- expand travis configuration

.travis.yml

@@ -2,10 +2,25 @@ language: python
 sudo: false
 python:
     - 2.7
+    - 3.4
+    - 3.5
+    - 3.6
+
 install:
+    - pip install -U setuptools==33.1.1 coveralls coverage
     - python bootstrap.py
     - bin/buildout
+
 script:
-    - bin/test -v1
+    - coverage run bin/test -v1
+after_success:
+    - coverage combine
+    - coveralls
+
 notifications:
     email: false
+
+cache:
+  pip: true
+  directories:
+    - eggs/