Test against Django 1.10b1 (#4210)

* Test against Django 1.10b1
* Test against Django master

Author: jpadilla

.travis.yml

@@ -22,6 +22,10 @@ env:
 
 matrix:
     fast_finish: true
+    allow_failures:
+      - TOX_ENV=py27-djangomaster
+      - TOX_ENV=py34-djangomaster
+      - TOX_ENV=py35-djangomaster
 
 install:
     # Virtualenv < 14 is required to keep the Python 3.2 builds running.

tox.ini

@@ -6,7 +6,8 @@ envlist =
        py27-{lint,docs},
        {py27,py32,py33,py34,py35}-django18,
        {py27,py34,py35}-django19,
-       {py27,py34,py35}-django110
+       {py27,py34,py35}-django110,
+       {py27,py34,py35}-django{master}
 
 [testenv]
 commands = ./runtests.py --fast {posargs} --coverage -rw
@@ -16,7 +17,8 @@ setenv =
 deps =
         django18: Django==1.8.13
         django19: Django==1.9.7
-        django110: Django==1.10a1
+        django110: Django==1.10b1
+        djangomaster: https://github.com/django/django/archive/master.tar.gz
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt
 basepython =