test code coverage added

Author: vishnubob

.gitignore

@@ -1,2 +1,3 @@
 build
 *.pyc
+.coverage

.travis.yml

@@ -9,6 +9,9 @@ before_install:
     - sudo apt-get -qq update
     - sudo apt-get install build-essential python-dev swig libasound2-dev
 install:
+    - pip install coveralls
     - python setup.py install
 script:
-    - nosetests
+    - nosetests --with-coverage --cover-package=midi
+after_success:
+    - coveralls