Fixed an upgrade script
Fixed two docstrings
Merge pull request #1340 from gem/prefiltering

Prefiltering sources in all calculators
Merge branch 'master' of github.com:gem/oq-engine into split-area-sources
Force BROKER_POOL_LIMIT to 1024 so it can reuse a single connection
Force disable of RATE_LIMITS to improve performances
Moved BROKER_POOL_LIMIT from 1024 to 10 as it's the default is Celery 2.5
CELERY_DISABLE_RATE_LIMITS will be pushed later
Merge pull request #1342 from gem/fix-add-grants

Fixed an upgrade script
Comment improved
Merge pull request #1344 from gem/fix-errno99

Force BROKER_POOL_LIMIT to 10
Merge branch 'master' of github.com:gem/oq-engine into split-area-sources
Merge branch 'split-area-sources' of github.com:gem/oq-engine into split-area-sources