Improve Travis testing

Author: nicoddemus

.travis.yml

@@ -1,7 +1,15 @@
 language: python
 
-python:
-  - 2.7
+jobs:
+  include:
+    - env: TOXENV=py27
+      python: '2.7'
+    - env: TOXENV=py34
+      python: '3.4'
+    - env: TOXENV=py35
+      python: '3.5'
+    - env: TOXENV=py36
+      python: '3.6'
 
 install:
  - sudo apt-get update

setup.py

@@ -29,6 +29,7 @@
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Programming Language :: C++',
         'Topic :: Software Development :: Quality Assurance',
         'Topic :: Software Development :: Testing',

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,34,35}
+envlist = py{27,34,35,36}
 
 [testenv]
 deps=pytest