Template creation

I use cookiecutter and my [custom template](https://github.com/artemnovichkov/swift-project-template) for project generation. I guess you have the same problem - it's very hand to update or create a new template. How you do it? It would be great if you add a command for template generation based on existing project. I want to write a script for it, but if you have a plan for it, I'll wait 😃