v1.0.3 — adopt in existing projects
Adds guidance in TEMPLATE-USAGE.md for adopting the template in a project you've already started (degit + selective copy), separate from the "Use this template" flow for new repos.
Adds guidance in TEMPLATE-USAGE.md for adopting the template in a project you've already started (degit + selective copy), separate from the "Use this template" flow for new repos.