Safe v0.6.0

New Features

• safe init is a new command that lets you initialize a new
  Vault with custom keying configuration, greatly simplifying
  standup operations.

• safe rekey now features the same flags as safe init for
  consistency and uniformity.

• safe renew is a new command that lets you renew the current
  token (if it is renewable, which root tokens generally aren't)

Improvements

• Remove silly debugging statement that escaped into the wild.