Add loss type as mandatory attribute of risk outputs
Merge remote-tracking branch 'origin/master' into add-loss-type
Merge pull request #1333 from gem/add-loss-type

Add loss type to risk outputs.
Improved the IMT management by leveraging the new functionality in hazardlib
Merge pull request #1335 from gem/improved-imt-management

Improved the IMT management in the engine by leveraging the new functionality in hazardlib
Merged from master