Import a typesafe activator template from the CLI

If, like me, you don't want to use the activator UI, here is what the actual command line syntax for activator new looks like at the moment

activator new [project-name] [template-name]

• activator new will ask for a project name then to choose a template
• activator new [project-name] asks to choose a template
• activator new [project-name] [template-name] immediately creates a project from the given template