sudo: false
language: python
python:
  - "2.7"
  - "3.3"
  - "3.4"
  - "3.5"
  - "3.6"
install: pip install tox-travis
script:
  - tox -e pep8
  - tox

sudo: false
language: python
matrix:
  include:
    - python: "2.7"
      env: TEST_ENV=pep8
    - python: "2.7"
      env: TEST_ENV=py27
    - python: "3.3"
      env: TEST_ENV=py33
    - python: "3.4"
      env: TEST_ENV=py34
    - python: "3.5"
      env: TEST_ENV=py35
    - python: "3.6"
      env: TEST_ENV=py36
install: pip install tox
script: tox -e ${TEST_ENV}

Update the Travis CI matrix
Update the Travis CI matrix

This change updates .travis.yml to provide an explicit matrix that
includes a separate test for PEP8 testing.
