Implemented parallel filtering of the sources
Improved the source splitting in the tasks
Fixed the event based tests by fixing the ordeging of the sources
Removed the parameter source_max_weight
Merged from source-ordering
Merge branch 'master' into parallel-filtering
Added a docstring
Logged the total number of sources
Merged from filtering-sources
Setting job.is_running in task_arg_gen
Added a progress message
Merge branch 'master' of github.com:gem/oq-engine into parallel-filtering
Improved a log message
Reintroduce the 'terminate_job_when_celery_is_down' config option
Merge pull request #1495 from gem/revert-celeryisdown

Reintroduce the 'terminate_job_when_celery_is_down' config option
Improved a warning
Improved a progress message
Added some info
Factored out a method process_sources
Passing the site collection to the filtering task