v4.0.1: The first patch-release!

This release contains some minor fixes and improvements, as well as a lot more documentation.

More documentation

• Documentation for
  • substitute
  • process
  • extract

Git-based installation

• getting-started - a repository with all you need to start using a sheesy vault in teams.
  • See https://github.com/share-secrets-safely/getting-started