Launch 3 nodes on ports 7379 to 7381 with cluster enabled.

Add command CLUSTER NODES

src/main/java/redis/clients/jedis/BinaryClient.java

@@ -1100,4 +1100,9 @@ public class BinaryClient extends Connection {
     public void hincrByFloat(final byte[] key, final byte[] field, double increment) {
     	sendCommand(HINCRBYFLOAT, key, field, toByteArray(increment));
     }
+    
+    public void cluster(final byte[]... args) {
+    	sendCommand(CLUSTER, args);
+    }
+
 }