update readme
update readme

nolanlawson/buffer,btd/buffer,feross/buffer,beni55/buffer,kawanet/buffer,nolanlawson/buffer,SAGV/buffer,kawanet/buffer,mafintosh/buffer,LinusU/buffer,jessetane/buffer,LinusU/buffer,loon3/buffer,loon3/buffer,LiuDeng/buffer,LiuDeng/buffer,beni55/buffer,feross/buffer,btd/buffer,feross/buffer,mafintosh/buffer,SAGV/buffer