Merge pull request #262 from toslunar/hacking100

Use hacking 1.0

.travis.yml

@@ -20,7 +20,7 @@ install:
   - pip install jupyter
   - pip install atari_py>=0.1.1
   - pip install autopep8
-  - pip install hacking
+  - pip install "hacking<1.1"
   - pip install coveralls
   - python setup.py develop
   - python -c "import numpy; numpy.show_config()"