In order to use protocol buffers, first you need to install the protoc
to be available in your command line. Follow the instructions from the official
documentation for your OS here.
The .go corresponding to the .proto examples are already available in the
folder. If you want to compile them you can run:
protoc --go_out=$GOPATH/src *.proto
Remember than depending on where the generated .go files are stored you
need your imports to be set accordingly.