v0.12.2.5

This release contains improvements and updates to the following:

Back ports from Bitcoin
New Gitian build setup and improvements (deterministic builds)
InstantSend fixes
Masternode list sync fix
PoVNET implementation to complement integration work of the Proof of View Platform
Governance Improvements
Hardcoded Seeds pulled directly from the Masternode List
Remove Watchdog_Expired and replace with No_Sentinel_Ping
Improved initial sync and connection
General bug fixes
Develop Testnet and Mining Pool integration
General Stability improvements
Install script improvements
Small GUI improvements
Proposal C2 implementation - Hard Fork at Block 385440