Remove slow flag in Travis configuration file

Author: BastienTr

.travis.yml

@@ -31,7 +31,7 @@ install:
     - python setup.py install
 script:
     # Your test script goes here
-    - nosetests -a '!slow' --with-coverage --cover-package=commpy --logging-level=INFO
+    - nosetests --with-coverage --cover-package=commpy --logging-level=INFO
 # Calculate coverage
 after_success:
     - coveralls