* Add StagingArea struct
* Implemented staging areas in blockStore
* Move blockStagingShard to separate folder
* Apply staging shard to acceptanceDataStore
* Update blockHeaderStore with StagingArea
* Add StagingArea to BlockRelationStore
* Add StagingArea to blockStatusStore
* Add StagingArea to consensusStateStore
* Add StagingArea to daaBlocksStore
* Add StagingArea to finalityStore
* Add StagingArea to ghostdagDataStore
* Add StagingArea to headersSelectedChainStore and headersSelectedTipStore
* Add StagingArea to multisetStore
* Add StagingArea to pruningStore
* Add StagingArea to reachabilityDataStore
* Add StagingArea to utxoDiffStore
* Fix forgotten compilation error
* Update reachability manager and some more things with StagingArea
* Add StagingArea to dagTopologyManager, and some more
* Add StagingArea to GHOSTDAGManager, and some more
* Add StagingArea to difficultyManager, and some more
* Add StagingArea to dagTraversalManager, and some more
* Add StagingArea to headerTipsManager, and some more
* Add StagingArea to constnsusStateManager, pastMedianTimeManager
* Add StagingArea to transactionValidator
* Add StagingArea to finalityManager
* Add StagingArea to mergeDepthManager
* Add StagingArea to pruningManager
* Add StagingArea to rest of ValidateAndInsertBlock
* Add StagingArea to blockValidator
* Add StagingArea to coinbaseManager
* Add StagingArea to syncManager
* Add StagingArea to blockBuilder
* Update consensus with StagingArea
* Add StagingArea to ghostdag2
* Fix remaining compilation errors
* Update names of stagingShards
* Fix forgotten stagingArea passing
* Mark stagingShard.isCommited = true once commited
* Move isStaged to stagingShard, so that it's available without going through store
* Make blockHeaderStore count be avilable from stagingShard
* Fix remaining forgotten stagingArea passing
* commitAllChanges should call dbTx.Commit in the end
* Fix all tests tests in blockValidator
* Fix all tests in consensusStateManager and some more
* Fix all tests in pruningManager
* Add many missing stagingAreas in tests
* Fix many tests
* Fix most of all other tests
* Fix ghostdag_test.go
* Add comment to StagingArea
* Make list of StagingShards an array
* Add comment to StagingShardID
* Make sure all staging shards are pointer-receiver
* Undo bucket rename in block_store
* Typo: isCommited -> isCommitted
* Add comment explaining why stagingArea.shards is an array
* Move timesorter to its own package and remove unused functions
* Remove padding+genesis from BlockWindow
* Adjust the difficulty even when there's less than difficultyAdjustmentWindowSize blocks
* Remove unnecessary check from checkBlockTransactionsFinalized
* Update tests with new pastMedianTime and Difficulty
* Review nit
* Convert BlockGHOSTDAGData from an interface to a public struct with getters
* Move hashes.Less to externalapi so it can access the hashes directly without copying
* Reduce calls to ghostdagstore.Get in blueWindow
* Simplify the logic in RequiredDifficulty and reuse big.Int
* Remove bigintpool as its no longer used
* Use ChooseSelectedParent in RequiredDifficulty instead of looping over the parents
* Remove comment
* Change DifficultyAdjustmentWindowSize and TimestampDeviationTolerance from uint64 to int
* refactor block_heap for readability and usage
* Add a new SizedUpHeap
* Refactor BlueWindow with the new DAA
* Update TestBlueBlockWindow with the new DAA window
* Fix review requested changes
