Ergo Mainnet 3.1.0 Release

This version is introducing database layer changes. FULL RESYNC FROM SCRATCH IS NEEDED. Please remove your data folder (.ergo by default) before running the node.

IODB is replaced with LevelDB for blockchain and wallet storage. On testing machine this is resulting in significantly faster bootstrap & database takes few times less on a disk, also reduced memory footprint.

No changes in functionality, just “applicationId” field added to boxes and transactions tracked by the wallet.