Implement Closeable for Jedis, BinaryJedis etc.

This allows a Jedis object to participate in try-with-resources when
using Java 7+. This change is fully backwards compatible to Java 6 and
previous releases of the Jedis client.

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

@@ -1,5 +1,6 @@
 package redis.clients.jedis;
 
+import java.io.Closeable;
 import java.io.IOException;
 import java.net.InetSocketAddress;
 import java.net.Socket;
@@ -15,7 +16,7 @@ import redis.clients.util.RedisInputStream;
 import redis.clients.util.RedisOutputStream;
 import redis.clients.util.SafeEncoder;
 
-public class Connection {
+public class Connection implements Closeable {
     private String host;
     private int port = Protocol.DEFAULT_PORT;
     private Socket socket;
@@ -143,6 +144,11 @@ public class Connection {
 	}
     }
 
+    @Override
+    public void close() {
+	disconnect();
+   }
+
     public void disconnect() {
 	if (isConnected()) {
 	    try {