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/Commands.java

@@ -287,4 +287,10 @@ public interface Commands {
     public void objectIdletime(String key);
 
     public void objectEncoding(String key);
-}
+
+    public void bitcount(final String key);
+
+    public void bitcount(final String key, long start, long end);
+
+    public void bitop(BitOP op, final String destKey, String... srcKeys);
+}