added logo to README
added logo to README

dreamhead/moco,zhigang1992/moco,ruiruiguo/moco,ysjian/moco,LiuShulong/moco,ruiruiguo/moco,rickhan2014/moco,rickhan2014/moco,cgourlay/moco,zhigang1992/moco,jasonchaffee/moco,dreamhead/moco,ysjian/moco,jasonchaffee/moco,yonglehou/moco,cgourlay/moco,ForrestVV/moco,sandyway/moco,ForrestAlfred/moco,ForrestVV/moco,LiuShulong/moco,ForrestAlfred/moco,yonglehou/moco,sandyway/moco