Merge pull request jxmorris12#12 from sils1297/patch-1

travis: Build against more python versions

Author: myint

.travis.yml

@@ -2,9 +2,11 @@ language: python
 
 python:
     - "2.7"
+    - "pypy3"
     - "3.2"
     - "3.3"
     - "3.4"
+    - "nightly"
 
 before_install:
     # This is needed for Python multiprocessing (due to 3to2 dependency).