More items to the test matrix.

Author: ocefpaf

.travis.yml

@@ -7,10 +7,14 @@ matrix:
   include:
   - python: 2.7
     env: TEST_TARGET=default
+  - python: 3.4
+    env: TEST_TARGET=default
   - python: 3.5
     env: TEST_TARGET=default
   - python: 3.6
     env: TEST_TARGET=default
+  - python: 2.7
+    env: TEST_TARGET=doctest
   - python: 3.6
     env: TEST_TARGET=doctest
   - python: 3.6