[python-control-developers] [python-control/python-control] 531df8: Enable Travis builds for Python 3.5

[Rory Y. <ror...@gm...>]

  Branch: refs/heads/master
  Home:   https://github.com/python-control/python-control
  Commit: 531df8137020107f84e390bdb9c4047504888b3f
      https://github.com/python-control/python-control/commit/531df8137020107f84e390bdb9c4047504888b3f
  Author: Rory Yorke <ror...@gm...>
  Date:   2016-08-12 (Fri, 12 Aug 2016)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Enable Travis builds for Python 3.5