增加了redis工具库中的方法

sdkredis/redisCommon.go

@@ -243,3 +243,10 @@ func RedisZRevRangeByScore(conn redis.Conn, key string, startScore string, endSc
 	}
 	return RedisCommand(conn, "zrevrangebyscore", key, startScore, endScore, "withscore")
 }
+
+/*
+ * zscore
+ */
+func RedisZScore(conn redis.Conn, key string, member string) (reply interface{}, err error) {
+	return RedisCommand(conn, "zscore", key, member)
+}