* Add zcoin configuration
* Update ports registry
* Change verification_type to gpg-sha256
* Fix incorrect zcoin configurations
* Change backend verification type to sha256 due to no public key for gpg-sha256
* Initializes Zcoin factory
* Add zcoin parser
* Finish BlockChain implementation for XZC
* Implement EstimateFee for XZC
* Add RPC integration tests for XZC
* Add unittest for parser && fix wrong network params
* Fix incorrect RPC marshaler for XZC
* Add sync integration test for zcoin
* Add zcoin block parser
* Add more testdata for sync integration test
* Remove EstimateSmartFee test for XZC due to it not supported
* Refactor and cleanup XZC parser
* Fix zerocoin spend vin error
* Fix display zerocoin mint and spend
* Support script parser for spend
* Fix build errors and bugs after rebase
