Testing branch has been updated.
https://github.com/CryptoManiac/novacoin/tree/novacoin-next
Switch to unspent coins approach This commit replaces old transactions index with unspent coins database which contains a basic metadata like heights, amounts, coinstake/coinbase flags and timestamps. We still need access to blockchain for proof-of-stake blocks validation. Currently CheckProofOfStake() uses the coin database to find the block height, and then scans that block to find the dependency of coinstake kernel.
