Add sputnik to travis.yml (#2451)

* Add sputnik support

.travis.yml

@@ -51,13 +51,15 @@ install:
     - gulp
     - make install-test
     - pip install coveralls
+    - pip install pylint
     - pip install django==$DJANGO_VERSION
 
 script:
     - make coveralls
 
 after_success:
     - if [[ $TEST_DB_ENGINE == mysql ]]; then coveralls; fi
+    - python <(curl -s https://raw.githubusercontent.com/TouK/sputnik-ci/master/sputnik-ci.py)
 
 before_deploy:
     - sudo add-apt-repository -y ppa:spotify-jyrki/dh-virtualenv