These are almost identical to BIP39. They use the same word list except:
- The checksum is calculated differently
- Deriving the master key from them uses a different pbkdf512 salt
("electrum" vs "mnemonic")
This introduces a Mnemonic class for BIP39 (seed words)
validation as well as a HDMasterKey class with provides the
BIP32 & BIP43 support.
All tests went into the apputils unit test.