* Adds KDBX4 reader/writer interfaces
* Adds KDBX4 XML reader/write interfaces
* Implements test cases for KDBX4
* Fully compatible with KeePass2
* Corrects minor issues with Argon2 KDF
Note: This implementation is not yet connected to the
database itself and will corrupt existing kdbx3 db's.
* Implemented memory and parallelism parameters for Argon2Kdf
* Using libargon2; libsodium does not support Argon2d algorithm
* Moved basic rounds parameter into Kdf class
* Reimplemented benchmark algorithm; previous was utterly broken
* Add SHA512 support to CryptoHash
* Add ChaCha20 support
* Add HMAC support
* Add new HmacBlockStream, used in KDBX 4
* Add support for ChaCha20 protected stream