Added exception for missing identifier
Added exception for missing identifier
refactored orm product transformer
refactored orm product transformer
Merge branch 'task/import_no_identifier_exception' into task/product_import_properties

Conflicts:
	src/Pim/Bundle/ImportExportBundle/Cache/AttributeCache.php
Slight refactor of product transformer
Merge branch 'master' into task/product_import_properties
Corrected unit tests
Merge pull request #528 from akeneo/task/product_import_properties

Task/product import properties