v2.0.0 - for the users (and their experience)

V2.0.0: Better user experience and documentation

Besides the many improvements, you will also find a complete book about
the capabilities so far!

We also sign our binaries from here on, and make them available via homebrew.

Improvements

• vault list now produces precise URLs.
• vault remove can remove resources from the vault.
• vault recipient add now signs and re-exports added fingerprints to make
  recipient verification part of adding them, and help build a Web of Trust.
• vault recipients remove removes recipients and re-encrypts the vaults content.
• vault recipient add also adds recipients which are only in your gpg keychain.
  Previously it would always require an exported public key in the right spot.
• vault recipient add --verified allows to add any recipient by name, but requires
  you to assure you are able to encrypt for that recipient.
• vault add now creates sub-directories automatically.
• vault edit now tries to encrypt before launching the editor.
• vault add :something with a tty as standard input will open an editor automatically.

Breaking Changes

The breaking change requiring a major version increment is changes to the sy-vault.yml file.

• The at field is now called secrets
• recipients and gpg-keys paths are no relative to the sy-vault.yml file, not relative to the
  secrets directory.
• The '--at/-a' flag of sy vault is now --secrets-dir-dir/-s
• recipients add will now require fingerprints unless --verified is specified.

These improvements make handling paths consistent and less suprising.