ENH: do not hide output while running nosetests

Author: yarikoptic

.travis.yml

@@ -5,7 +5,7 @@ install:
   - pip install coveralls flake8 
 
 script: 
-  - nosetests -v --with-coverage *.py
+  - nosetests -v -s --with-coverage *.py
   - flake8 *.py
 after_success:
   - coveralls