Merge pull request #156 from political-memory/responsediff_up

Responsediff 0.7.1 released with fix

.travis.yml

@@ -10,7 +10,6 @@ services:
 - postgresql
 install:
 - pip install -U setuptools
-- pip install git+https://github.com/njoyard/django-responsediff.git@fix-selectors-encoding
 - pip install -e .[testing]
 before_script:
 - bin/install_client_deps.sh