modified travis yml file to update the matrix testing for Python 3.5 and 3.6

Author: chrissimpkins

.travis.yml

@@ -4,15 +4,16 @@ sudo: false
 language: python
 matrix:
   include:
+    - python: 2.7
+      env: TOX_ENV=py27
+    - python: 2.7
+      env: TOX_ENV=py33
+    - python: 2.7
+      env: TOX_ENV=py34
     - python: 3.5
-      env:
-        - TOX_ENV=py27
-        - TOX_ENV=py33
-        - TOX_ENV=py34
-        - TOX_ENV=py35
+      env: TOX_ENV=py35
     - python: 3.6
-      env:
-        - TOX_ENV=py36
+      env: TOX_ENV=py36
 
 script: tox -e $TOX_ENV