Added command plot_agg_curve
Added command plot_agg_curve


Former-commit-id: 64f064b204d731ad5bc7ef2e20d77a4dfaa29812 [formerly 64f064b204d731ad5bc7ef2e20d77a4dfaa29812 [formerly cbe0f2080f2075535ff1b41b5690500775a82637]]
Former-commit-id: 85ab4ac210fa32f2fafb771ac894f1faf86a2b2c
Former-commit-id: 128876ba11bbbb9430d837decc781ff1fcd588b4
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine