Merge pull request #5 from mdickinson/update-python-versions

Drop support for Python 2.6; update Python versions in Travis CI

.travis.yml

@@ -1,15 +1,11 @@
 language: python
 python:
-  - 2.6
   - 2.7
-  - 3.2
-  - 3.3
-  - 3.4
+  - 3.5
+  - 3.6
   - pypy
-install:
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install unittest2; fi
 script:
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then unit2 discover -v; else python -m unittest discover -v; fi
+  - python -m unittest discover -v
 notifications:
   email:
     - dickinsm@gmail.com

test_polygon.py

@@ -2,11 +2,7 @@
 Tests for Polygon.winding_number.
 
 """
-import sys
-if sys.version_info >= (2, 7):
-    import unittest
-else:
-    import unittest2 as unittest
+import unittest
 
 try:
     import numpy

test_polyhedron.py

@@ -2,11 +2,7 @@
 Tests for Polyhedron winding number calculation.
 
 """
-import sys
-if sys.version_info >= (2, 7):
-    import unittest
-else:
-    import unittest2 as unittest
+import unittest
 
 try:
     import numpy