Preliminary work to implement the stats_only functionality
Moved some stuff from HazardCalculation to JobParam
Added a few other parameters to JobParam
Small improvements
Merged from master
Fixed several tests
Added parameter region_constraint
Added flag insured_losses
Added a test for the parameter individual_curves
Better validation
Added loss_curve_resolution
Merge branch 'master' of github.com:gem/oq-engine into stats-only
Fixed a few tests
Added parameter master_seed
Special case for ground_motion_field_model_params
Fixed validation_test.py
Merge pull request #1516 from gem/stats-only

Stats only
Merge branch 'master' of github.com:gem/oq-engine into what-if-I-upgrade