Removed sa_period and sa_damping from gmf_scenario
Removed gmf_scenario.result_grp_ordinal
Implemented a new distribution per block of sites in the scenario hazard calculator
Cosmetic change
Merged from master
Fixed the qa tests for scenario_risk
bin/oq_create_db:

Get the proper oq-engine version from the python package.
db/schema/load.sql:

The static revision info has been moved to the oq_create_db script. It also no
longer uses hard-coded version numbers.
Merge pull request #1065 from larsbutler/correct-version-in-db-script

Correct OQ engine version in db script

[r=micheles] [f=*trivial]
Added a comment
Merge pull request #1055 from gem/simplify_gm_scenario

Fix the memory occupation issue for the scenario_risk calculator
Merge branch 'master' of https://github.com/gem/oq-engine into preloaded-exposure