Allow building block from local json

Allow to create a Block instance from the Duniter blockchain files.

changed milestone to %0.60.0

added D: Block Feature Py ≥ 3.6 labels

mentioned in merge request !105 (closed)

removed Py ≥ 3.6 label

changed title from [feat] allow building block from local json to Allow building blocks from local Duniter json database

changed title from Allow building blocks from local Duniter json database to Allow building block from local json

changed milestone to %0.61.0

changed milestone to %0.62.0

unassigned @vtexier

changed milestone to %0.61.0

changed milestone to %Backlog

mentioned in merge request !124 (merged)

changed milestone to %0.62.0

closed

mentioned in merge request !128 (merged)