v0.6.0

Action receipts (Parafé broker AP2 Phase 2, B6): signActionReceipt(), fileActionReceipt() (a duplicate returns the original acknowledgment), recordActionReceipt(), getActionReceipts(); SessionReceipt.actions is decoded. Reputation floors in ScopePolicy (B18) and ForbiddenError.reputation. recordAction() is deprecated: /interaction/record is being retired. ConflictError.body, jcs / jsonHash exported.