Maven Dependencies for rserve and rengine

<dependency>
  <groupId>org.rosuda.REngine</groupId>
  <artifactId>Rserve</artifactId>
  <version>1.8.1</version>
</dependency>

<dependency> 
  <groupId>org.rosuda.REngine</groupId>
  <artifactId>REngine</artifactId>
  <version>2.1.0</version>
</dependency>