calcs/hazard/classical/core:
calcs/hazard/classical/core:

Added a couple of utility functions for (incrementally) fetching
hazard curves for post-processing.


Former-commit-id: d4013061eee920ce1cd336f9d8db2d646cb5da93 [formerly 01f456c6eb2bc7a98be0ec67ea5bb27a9e31534d]
Former-commit-id: d9480d000d33d633d7f0ebda3291653f38b0c61d
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine