  DJANGO =
      1.10: django110
      1.11: django111
      2.0: django20
      master: djangomaster
  
  [testenv]
  commands = ./runtests.py --fast {posargs} --coverage -rw
 
</s>
    2.1: django21
  DJANGO =
      1.10: django110
      1.11: django111
      2.0: django20
    2.1: django21
      master: djangomaster
  
  [testenv]
  commands = ./runtests.py --fast {posargs} --coverage -rw
keep keep keep add keep keep keep keep
 updated tox and travis for django 2.1 alpha1
tox.ini