merge Bitcore integration#8

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nimbosa wants to merge 4 commits intov1.1.1-ALPHAfrom

Commits on Mar 1, 2018

Significant updates enabling explorer, includes mempool address indexing methods
interbiznw
committed

Commits on Sep 2, 2018

Bitcore
TheTrunk
committed
fixes
TheTrunk
committed

Commits on Sep 6, 2018

cleanup and merge: https://github.com/zclassicbitcore/zclassic
nimbosa
committed