Added coverage testing via coveralls.io

.travis.yml

@@ -19,6 +19,8 @@ matrix:
           env: NUMPY_VERSION=1.5.1 SETUP_CMD='test'
         - python: 3.2
           env: NUMPY_VERSION=1.6.2 SETUP_CMD='test'
+        - python: 2.7
+          env: NUMPY_VERSION=1.7.1 SETUP_CMD='cov'
 
 before_install:
    - sudo apt-get update -qq
@@ -30,6 +32,13 @@ install:
    - pip -q install --upgrade "numpy==$NUMPY_VERSION" --use-mirrors
    - pip -q install h5py
    - pip -q install astropy
+   - if [[ $SETUP_CMD == cov ]]; then pip install pytest -q --use-mirrors; fi
+   - if [[ $SETUP_CMD == cov ]]; then pip install pytest-cov -q --use-mirrors; fi
+   - if [[ $SETUP_CMD == cov ]]; then pip install coveralls -q --use-mirrors; fi
 
 script:
-   - python setup.py $SETUP_CMD
+   - if [[ $SETUP_CMD == test ]]; then python setup.py test ; fi
+   - if [[ $SETUP_CMD == cov ]]; then py.test --cov astrodendro; fi
+
+after_success:
+  - if [[ $SETUP_CMD == cov ]]; then coveralls; fi