add sdk download impl

liuxiaolong

2020-06-08 2a4041f16c6588921c87df93927e9076c2cc309d

 discovery/server.go

@@ -5,7 +5,7 @@
//   "basic.com/valib/gopherdiscovery.git"
//   "github.com/gogo/protobuf/proto"
//   "time"
//   "webserver/extend/logger"
//   "basic.com/valib/logger.git"
//)
//
//const (