* Replace custom DerivationPath impl * Add method to parse full-path from str with hardening * Convert Bip44 to trait * Hoist more work on derivation-path * Privatize Bip44 trait
* Replace custom DerivationPath impl * Add method to parse full-path from str with hardening * Convert Bip44 to trait * Hoist more work on derivation-path * Privatize Bip44 trait