TST pip install coveralls

Author: hayd

.travis.yml

@@ -37,6 +37,7 @@ install:
   # Replace dep1 dep2 ... with your dependencies
   - conda create -q -n test-environment python=$PYTHON pandas=$PANDAS nose coverage setuptools
   - source activate test-environment
+  - pip install coveralls --quiet
   - conda list
   - python setup.py install