Step 2: Add BUILDING document.
Step 2: Add BUILDING document.

DR-YangLong/RocketMQ,dongeforever/incubator-rocketmq,penghuazhou/incubator-rocketmq,lollipopjin/incubator-rocketmq,shroman/incubator-rocketmq,lollipopjin/incubator-rocketmq,vsair/incubator-rocketmq,diwayou/apache-rocketmq-all,wildwind/incubator-rocketmq,vesense/incubator-rocketmq,lindzh/incubator-rocketmq,vesense/incubator-rocketmq,wildwind/incubator-rocketmq,penghuazhou/incubator-rocketmq,Coneboy-k/incubator-rocketmq,vsair/incubator-rocketmq,vsair/incubator-rocketmq,shroman/incubator-rocketmq,penghuazhou/incubator-rocketmq,Todd-start/RocketMQ,vesense/incubator-rocketmq,lindzh/incubator-rocketmq,shroman/incubator-rocketmq,lindzh/incubator-rocketmq,DR-YangLong/RocketMQ,diwayou/apache-rocketmq-all,dongeforever/incubator-rocketmq,Coneboy-k/incubator-rocketmq,Todd-start/RocketMQ,Vansee/RocketMQ