Add codecov.io reporting (#115)

* Add codecov?

* Add codecov/pypi badges

Author: Ryan P Kilby

.travis.yml

@@ -18,6 +18,8 @@ install:
 script:
   - coverage run manage.py test
   - coverage report
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
 
 matrix:
   exclude:

README.rst

@@ -7,8 +7,14 @@ E.g. using ``django-rest-framework-filters`` instead of just ``django-filter``,
 
 Without having to create a zillion filter fields by hand.
 
-.. image:: https://secure.travis-ci.org/philipn/django-rest-framework-filters.png?branch=master
-   :target: http://travis-ci.org/philipn/django-rest-framework-filters
+.. image:: https://travis-ci.org/philipn/django-rest-framework-filters.png?branch=master
+  :target: https://travis-ci.org/philipn/django-rest-framework-filters
+
+.. image:: https://codecov.io/gh/philipn/djangorestframework-filters/branch/master/graph/badge.svg
+  :target: https://codecov.io/gh/philipn/djangorestframework-filters
+
+.. image:: https://img.shields.io/pypi/v/djangorestframework-filters.svg
+  :target: https://pypi.python.org/pypi/djangorestframework-filters
 
 Installation
 ------------