Restored extract_agg_curves [demos][skip hazardlib]
Restored extract_agg_curves [demos][skip hazardlib]


Former-commit-id: 5939f04dc4304bbcf8003205428d02fb5844b699 [formerly 163256e0c644bc936df2c512eaed87884fc61510]
Former-commit-id: 049cbaa95ea02a89d4fcd199ba09b5d733324f12
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine