Merge pull request #1368 from ducin/badge-maven-central

maven central badge added

Author: fehguy

README.md

@@ -1,6 +1,7 @@
 # Swagger Code Generator
 
 [![Build Status](https://travis-ci.org/swagger-api/swagger-codegen.png)](https://travis-ci.org/swagger-api/swagger-codegen)
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/io.swagger/swagger-codegen-project/badge.svg?style=plastic)](https://maven-badges.herokuapp.com/maven-central/io.swagger/swagger-codegen-project)
 
 ## Overview
 This is the swagger codegen project, which allows generation of client libraries automatically from a Swagger-compliant server.