Fix broken tests.
Add public key functions to PGP utils.
Minor updates to vault.util.pgp.
Add initial vault.data.signature ns.
Refactor some io and pgp utilities.
Move PGP functionality into separate namespace.
Factor more PGP functions and tests.
Refactor KeyProvider protocol to KeyStore.
More PGP test fixes and refactoring.
Factor more crypto-related code into mvxcvi.crypto.
Split key provider functions into separate ns.
Use str instead of s alias for clojure.string.
Record some doc ideas for 'bytes' schema.
Elaborate on tmux init script.
Merge branch 'refactor-pgp-lib' into develop