Update list of allowed params

[josecelano]

Some API endpoints allow new flags (url parameters). We have to update clients with the list of new params.

IMPORTANT: new params can be used even with old php-client versions setting validation level to log or disabled in configuration. See https://github.com/blockcypher/php-client/wiki/Validation for more info about validation.

New allowed params are:

• AddressClient::getBalance: omitWalletAddresses
• AddressClient::get: includeScript
• WalletCLient::addAddresses: omitWalletAddresses
• WalletClient::getWalletAddresses: used, zerobalance
• WalletClient::deriveAddress: count, subchain_index (NOT IMPLEMENTED YET)
• TXClient::create: includeToSignTx
• MetadataClient::get: private (NOT IMPLEMENTED YET)
• MetadataClient::put: private (NOT IMPLEMENTED YET)
• PaymentForwardClient::listForwardingAddresses: start