* [NOD-1458] Rename RestoreUTXOSet to RestorePastUTXOSet.
* [NOD-1458] Make CalculateAcceptanceDataAndMultiset take BlockGHOSTDAGData and nothing else.
* [NOD-1458] Make ConsensusStateStore's Update take ConsensusStateChanges instead of just UTXODiff.
* [NOD-1458] Add Tips() to ConsensusStateStore.
* [NOD-1458] Make all implementation structs private.
* [NOD-1458] Remove BlockAtDepth and add highHash to ChainBlockAtBlueScore.
* [NOD-1458] Rename CalculateAcceptanceDataAndMultiset to CalculateAcceptanceDataAndUTXOMultiset.
* [NOD-1458] Add a dependency to GHOSTDAGManager from ConsensusStateManager.
* [NOD-1458] Add ChooseSelectedParent to GHOSTDAGManager.
* [NOD-1458] Add DifficultyManager.
* [NOD-1458] Add PastMedianTimeManager.
* [NOD-1458] Add Hash() to Multiset.
* [NOD-1458] Add a dependency to ghostdagManager from blockProcessor.
* [NOD-1458] Add errors to all interfaces that need them.
* [NOD-1458] Uppercasify types in comments.
* [NOD-1458] Fix a bad comment.
* [NOD-1458] Fix a comment.
* [NOD-1458] Rename ChainBlockAtBlueScore to HighestChainBlockBelowBlueScore.
* [NOD-1458] Replace BlockAndTransactionValidator with an anonymous interface.
* [NOD-1413] Remove /cmd/addblock
* [NOD-1413] Define and implement TransactionValidator.
* [NOD-1413] Make changes to ConsensusStateManager's interface.
* [NOD-1413] Make changes to PruningManager's interface.
* [NOD-1413] Make changes to DAGTraversalManager's interface.
* [NOD-1413] Make changes to MultisetStore's interface.
* [NOD-1413] Make changes to UTXODiffStore's interface.
* [NOD-1413] Make changes to UTXODiffStore's interface harder.
* [NOD-1413] Make changes to AcceptanceDataStore's interface harder.
* [NOD-1413] Make changes to PruningStore's interface.
* [NOD-1413] Delete BlockIndex.
* [NOD-1413] Add FeeDataStore.
* [NOD-1413] Update BlockMessageStore's interface.
* [NOD-1413] Fix interface violations.
* [NOD-1413] Add FeeDataStore to BlockProcessor.
* [NOD-1413] Make go vet happy.
* [NOD-1413] Add missing fields to ConsensusStateChanges.
* [NOD-1413] Add another missing field to ConsensusStateChanges.
* [NOD-1413] Add a reference to blockStore in consensusStateManager.
* [NOD-1413] Add missing methods to UTXODiffStore.
* [NOD-1413] Rename pruningPointStore to pruningStore everywhere.
* [NOD-1413] Remove superfluous parameters from CalculateConsensusStateChanges.
* [NOD-1413] Add missing dependencies to PruningManager.
* [NOD-1413] Remove implementation-y functions from TransactionValidator's interface.
* [NOD-1413] Make go vet happy.
* [NOD-1413] Add a couple of methods to DAGTopologyManager.
* [NOD-1413] Fix a typo in a file name.
* [NOD-1413] Remove non-interface functions from Validator.
