Added pipeline support

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

@@ -0,0 +1,11 @@
+package redis.clients.jedis;
+
+public abstract class JedisPipeline {
+    protected Client client;
+
+    public void setClient(Client client) {
+	this.client = client;
+    }
+
+    public abstract void execute();
+}