Jedis does support lpushx and rpushx

Conflicts:

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

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

@@ -160,4 +160,8 @@ 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); 
 }