Added source and rupture filtering to stochastic_event_set_poissonian
Merge branch 'master' of github.com:gem/oq-engine into 1178571
Merge branch '1178571' of github.com:gem/oq-engine into 1178571

Conflicts:
	openquake/engine/calculators/hazard/event_based/core.py
Merge pull request #1176 from gem/1178571

Filter the ruptures according to the maximum_distance criterium
Merge branch 'master' of github.com:gem/oq-engine into export-gmf_agg