- this is a major refactor of the code and may have broken some behavior
in the wallet or witness nodes.
- this commit changes the serialization of operations
- the chain_tests pass
witnesses, registering witness url.
Derive memo, witness, etc. keys from the active key.
Make witness_create_operation accept relative key identifiers.
Prevent wif_to_key from throwing on invalid base58 input.
Make witness_node accept witness keys in WIF format.
