The following products are required to build:
- Rust >= 1.39.0
- make >= 3.81
- protoc >= 3.9.2
- protobuf-codegen = 2.10.1
- grpcio-compiler = 0.4.3
% brew install protobuf # OS X
% apt-get install protobuf-compiler # Linux
% cargo install protobuf-codegen
% cargo install grpcio-compiler
% make build