v4.1.0

Merged new features and bug fixes from Geth Classic, including:

• Recoverability and stability for blockchain database.
• mlog machine-readable and event-based logging.
• Added dump command that allows dumping the full blockchain database.
• Please see the Geth Classic release note for more information.

Included specific bug fixes and stability fixes for Ellaism, including:

• Fixed a bug in test where it uses the wrong minimal gas limit.
• Added new startup message for Ellaism.