Add python2 to the CI

Author: denisorehovsky

.travis.yml

@@ -5,6 +5,9 @@ cache: pip
 matrix:
   fast_finish: true
   include:
+    - python: 2.7
+      env: TOXENV=py27-django111-drf37
+
     - python: 3.4
       env: TOXENV=py34-django111-drf37
     - python: 3.4

tox.ini

@@ -1,5 +1,6 @@
 [tox]
 envlist =
+    py27-django111-drf37
     {py34,py35,py36,py37}-django{111,20}-drf37,
     py{35,36,37}-djangomaster-drf37
     flake8
@@ -8,6 +9,7 @@ envlist =
 [testenv]
 passenv = CI TRAVIS TRAVIS_*
 basepython =
+    py27: python2.7
     py34: python3.4
     py35: python3.5
     py36: python3.6