Adding coveralls.io and coverage generation

Author: carlio

.coveragerc

@@ -0,0 +1,3 @@
+
+[run]
+source=pylint_celery

.travis.yml

@@ -3,7 +3,11 @@ python:
   - "2.6"
   - "2.7"
 install:
+  - "pip install --use-mirrors coverage coveralls"
   - "pip install --use-mirrors -r test_requirements.txt"
   - "pip install --use-mirrors git+https://github.com/landscapeio/pylint-plugin-utils.git@develop"
   - "pip install --use-mirrors --editable ."
-script: python test/test_func.py
+script:
+  coverage run test/test_func.py
+after_success:
+  coveralls