V0.6 summary of protocol changes

[Sentinelrv]

The summary was detailed here as Peercoin Team Update #5:

V0.6 Feature List, Current Progress & Release Timeline

What is New in Peercoin v0.6? Peercoin has been re-based to Bitcoin v0.8.6. Opt-out of synchronized checkpoints has been implemented and can be activated through an option in the menu (this allows the client to stop using the special “checkpoint” node as a reference point when it comes to consensus). BIP65 (OP_CHECKLOCKTIMEVERIFY) has been implemented and a client is being prepared to start testing the new protocol through a fork of the testnet. Autotools-based build process has been…