Just some name changes, put in a stand in emission amount, and started copying the algo from Karlsen. Not release worthy yet. Therefore Dev branch exists now.
Also, for now this is for research purposes only. I got no clue what to build on top of Kaspa yet.
Help would be appreciated for ideas and implementations.
* Add a new message: BlockLocatorHighestHash.
* Add a new message: IBDBlockLocator.
* Implement HandleIBDBlockLocator.
* Reimplement findHighestSharedBlockHash.
* Make HandleIBDBlockLocator only return hashes that are in the selected parent chain of the target hash.
* Increase the cache sizes of blockRelationStore, reachabilityDataStore, and ghostdagDataStore.
* Fix wrong initial highHash in findHighestSharedBlockHash.
* Make go vet happy.
* Protect against receiving wrong messages when expecting MsgIBDBlockLocatorHighestHash.
