- Changed password setup to use libsodium and argon2id (regular SHA256
hashing for passwords is inadequate as modern GPU's can hash generate
billions of hashes per second).
- Added code to auto migrate old passwords to the new password_hash if
the existing password_hash matches either of the legacy password
generation schemes (SHA1 or SHA256).
- Added migration to support new password_hash format length
- Added column password_revision. This field will default to 0, which
all passwords will have till they're updated. After that each password
hash method has a revision.
- Added type hinting (for now, 3.5-compatible)
- Split `db` namespace into `db` module and `model` namespace
- Changed elastic search to be created lazily for each operation
- Changed to class based approach in entity serialization to allow
stronger typing
- Removed `required` argument from `context.get_*` family of functions;
now it's implied if `default` argument is omitted
- Changed `unalias_dict` implementation to use less magic inputs
ReAnzu