Reference implementation of BIP-0039: Mnemonic code for generating
deterministic keys.

This BIP describes the implementation of a mnemonic code or mnemonic
sentence – a group of easy to remember words – for the generation
of deterministic wallets.

It consists of two parts: generating the mnenomic, and converting
it into a binary seed. This seed can be later used to generate
deterministic wallets using BIP-0032 or similar methods.
