Merge branch 'Issue221' of https://github.com/ivowiblo/jedis into issue221

Conflicts:
	src/main/java/redis/clients/jedis/BinaryJedisCommands.java

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

@@ -181,4 +181,8 @@ public interface BinaryJedisCommands {
     Long objectIdletime(byte[] key);
 
     byte[] objectEncoding(byte[] key);
+
+    Long lpushx(byte[] key, byte[] string);
+
+    Long rpushx(byte[] key, byte[] string);
 }

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

@@ -190,6 +190,17 @@ public class BinaryShardedJedis extends Sharded<Jedis, JedisShardInfo>
 	return j.lpush(key, strings);
     }
 
+    public Long lpushx(byte[] key, byte[] string) {
+        Jedis j = getShard(key);
+        return j.lpushx(key, string);
+    }
+    
+
+    public Long rpushx(byte[] key, byte[] string) {
+        Jedis j = getShard(key);
+        return j.rpushx(key, string);
+    }
+
     public Long llen(byte[] key) {
 	Jedis j = getShard(key);
 	return j.llen(key);

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

@@ -186,4 +186,8 @@ public interface JedisCommands {
 
     Long linsert(String key, Client.LIST_POSITION where, String pivot,
             String value);
+    
+    Long lpushx(String key, String string);
+    
+    Long rpushx(String key, String string); 
 }

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

@@ -208,6 +208,16 @@ public class ShardedJedis extends BinaryShardedJedis implements JedisCommands {
 	return j.lpush(key, strings);
     }
     
+    public Long lpushx(String key, String string) {
+        Jedis j = getShard(key);
+        return j.lpushx(key, string);
+    }
+    
+    public Long rpushx(String key, String string) {
+        Jedis j = getShard(key);
+        return j.rpushx(key, string);
+    }
+
     public Long llen(String key) {
 	Jedis j = getShard(key);
 	return j.llen(key);