Update README with new code coverage summary image

Author: kunalkapadia

README.md

@@ -93,7 +93,7 @@ Logs stacktrace of error to console along with other details. You should ideally
 
 ## Code Coverage
 Get code coverage summary on executing `npm test`
-![Code Coverage Text Summary](https://cloud.githubusercontent.com/assets/4172932/12619174/f581647c-c53c-11e5-8b0f-f0764391bd45.JPG)
+![Code Coverage Text Summary](https://cloud.githubusercontent.com/assets/4172932/12827832/a0531e70-cba7-11e5-9b7c-9e7f833d8f9f.JPG)
 
 `npm test` also generates HTML code coverage report in `coverage/` directory. Open `lcov-report/index.html` to view it.
 ![Code coverage HTML report](https://cloud.githubusercontent.com/assets/4172932/12625331/571a48fe-c559-11e5-8aa0-f9aacfb8c1cb.jpg)