https://github.com/CryptoManiac/novacoin/commit/c0e8991ed1b482d0dab75f86e415fc63d1104d68

Cache scrypt hashes on disk
instead of recalculating every time. This policy is able to give us 10-20x startng speed up. User can disable caching with -fastindex=0 option.

Note that this commit makes blockindex code incompatible with old blockchain database files. You need to remove old blockchain files and syncronize with the network again.

Another changes:

1. Stake pooled keys are removed.

Happy new year, guys and ladies!

P.S. Builds will be published tomorrow.