An attempt to implement distribution by sites
I move ses_poissonian to the right position
Merged from event-base-performance
Added tabla gmf_agg
Fixed the GmfAgg implementation to make the unit tests run
Restored the query on Gmf in gmf_to_hazard_curve_task
Fixed a very subtle initialization bug breaking risk/event_based/core_test.py
Fixed the event_based QA tests
Merge branch 'master' of github.com:gem/oq-engine into event-base-performance-improve
Removed a comment
Merge branch 'master' of github.com:gem/oq-engine into event-base-performance-improve
Fixed a group by geography
Addressed Luigi's comments in https://github.com/gem/oq-engine/pull/1139
Merge pull request #1139 from gem/event-base-performance-improve

An attempt to solve the memory occupation issue for the event_based risk calculator