Merge pull request #399 from tyrcho/patch-1

add badge with link to maven central

README.md

 Activiti
 ========
 
-Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts. 
\ No newline at end of file
+[![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.activiti/activiti-engine/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.activiti/activiti-engine)
+
+
+
+Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.