Added bitcount to standard interfaces and bitop to MultiKey interfaces (since it is non-shardable)

Merge branch 'impl-bitcount-and-bitop' of git://github.com/koron/jedis

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

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

@@ -62,4 +62,6 @@ public interface MultiKeyBinaryRedisPipeline {
     Response<Long> publish(byte[] channel, byte[] message);
 
     Response<byte[]> randomKeyBinary();
+
+    Response<Long> bitop(BitOP op, final byte[] destKey, byte[]... srcKeys);
 }