Imports
- github.com/gengo/grpc-gateway/protoc-gen-grpc-gateway/httprule
- github.com/gengo/grpc-gateway/third_party/googleapis/google/api
- github.com/golang/glog
- github.com/golang/protobuf/proto
- github.com/golang/protobuf/protoc-gen-go/descriptor
- github.com/golang/protobuf/protoc-gen-go/generator
- github.com/golang/protobuf/protoc-gen-go/plugin