Added codecov badge
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| Build Status | Coverage |
|---|---|
-|[![Circle CI](https://circleci.com/gh/springfox/springfox/tree/master.svg?style=svg)](https://circleci.com/gh/springfox/springfox/tree/master)|[![Coverage Status](https://coveralls.io/repos/springfox/springfox/badge.svg)](https://coveralls.io/r/springfox/springfox) |
+|[![Circle CI](https://circleci.com/gh/springfox/springfox/tree/master.svg?style=svg)](https://circleci.com/gh/springfox/springfox/tree/master)|[![Coverage Status](https://coveralls.io/repos/springfox/springfox/badge.svg)](https://coveralls.io/r/springfox/springfox)[![codecov](https://codecov.io/gh/springfox/springfox/branch/master/graph/badge.svg)](https://codecov.io/gh/springfox/springfox) |
### About
For more information on this project visit the [Springfox Website] (http://springfox.io) or
