Key derivation using sha512

[rg911]

This PR introduced quite a few Breaking changes:

• All Key derivation and signing hash are now using SHA512. Means all KeyPairs generated and Addresses derived from publicKey are now having different hex values.
• Cleared the bond between NetworkType and SigningSchema. SigningSchema has now been removed from the SDK. There's no Keccak / SHA3 switch anymore.
• Key pair generation is now using nacl.sign.keypair from the standard nacl js script.
• Transaction signing is now using nacl.sign.detached from the standard nacl js script.
• Legacy catapult-nacl is still used for SharedKey derivation due to the multiplier methods is internal and not exported in the nacl js.

This PR also:

• Removed unused legacy catapult-nacl code in Utilities class
• Fixed the tests
• Fixed a few lint issues

[fboucquez]

Should we be case insensitive when comparing strings in places like:

• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/infrastructure/Listener.ts#L235
• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/infrastructure/Listener.ts#L336
• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/model/transaction/Transaction.ts#L301
• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/model/transaction/Transaction.ts#L318

Just wondering if some other clients create the transaction using lower case hex that then TS SDK will false-negative think it's not the same

[rg911]

Should we be case insensitive when comparing strings in places like:

• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/infrastructure/Listener.ts#L235
• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/infrastructure/Listener.ts#L336
• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/model/transaction/Transaction.ts#L301
• https://github.com/NEMStudios/nem2-sdk-typescript-javascript/blob/task/g441_key_derivation_sha512/src/model/transaction/Transaction.ts#L318

Just wondering if some other clients create the transaction using lower case hex that then TS SDK will false-negative think it's not the same

I think it should be okay as REST will always return upper case. but would add extra security