added 3.7

Author: jlwalke2

.travis.yml

@@ -1,14 +1,11 @@
+dist: xenial  # Currently required for Python 3.7
 language: python
 python:
   - "2.7"
-#  - "3.4"
+  - "3.4"
   - "3.5"
   - "3.6"
-
-#stages:
-#  - test
-#  - build
-#  - deploy
+  - "3.7"
 
 env:
   - PYTHONPATH=$PYTHONPATH:./src