title: How to generate swift files for protobuf
body: <p>I have .proto files from my employee. Now I need to connect to service with this proto instructions. As I understood I need to generate some files for my swift project for boxing/unboxing my messages. 
  But I can't understand how to do this. I've found many instructions how to install protobuf.</p>
  
  <p>Can anyone explain step by step what I need to do?
  Thanks in advance.</p>