Update tox.ini

Author: jpadilla

tox.ini

@@ -1,19 +1,19 @@
 [tox]
 envlist =
        py27-{flake8,docs},
-       {py26}-django{1.6}-drf{2.4.3,2.4.4,3.0},
-       {py27}-django{1.6,1.7}-drf{2.4.3,2.4.4,3.0}
+       {py26}-django{16}-drf{24,30,31},
+       {py27}-django{16,17}-drf{24,30,31}
 
 [testenv]
 commands = ./runtests.py --fast
 setenv =
        PYTHONDONTWRITEBYTECODE=1
 deps =
-       django1.6: Django==1.6.8
-       django1.7: Django==1.7.1
-       drf2.4.3: djangorestframework==2.4.3
-       drf2.4.4: djangorestframework==2.4.4
-       drf3.0: https://github.com/tomchristie/django-rest-framework/archive/3.0-beta.zip
+       django16: Django==1.6.3
+       django17: Django==1.7.2
+       drf24: djangorestframework==2.4.3
+       drf30: djangorestframework==3.0.0
+       drf31: djangorestframework==3.1.0
        pytest-django==2.6.1
 
 [testenv:py27-flake8]