Add preInsert method for positions
	modifié:         core/lib/Thelia/Model/ExportCategory.php
	modifié:         core/lib/Thelia/Model/Import.php
	modifié:         core/lib/Thelia/Model/ImportCategory.php
Add position management with categories for imports and exports
	modifié:         core/lib/Thelia/Model/Export.php
	modifié:         core/lib/Thelia/Model/Import.php
Fix import and import category parsing
	modifié:         core/lib/Thelia/Core/DependencyInjection/Loader/XmlFileLoader.php
Add import positionning
	modifié:         core/lib/Thelia/Controller/Admin/ImportController.php
	modifié:         templates/backOffice/default/import.html
Add translation
	modifié:         core/lib/Thelia/Config/I18n/en_US.php
	modifié:         core/lib/Thelia/Config/I18n/fr_FR.php
	modifié:         core/lib/Thelia/Controller/Admin/ImportController.php
	modifié:         templates/backOffice/default/I18n/en_US.php
	modifié:         templates/backOffice/default/I18n/fr_FR.php
Fix 404 usage
	modifié:         core/lib/Thelia/Controller/Admin/ExportController.php
	modifié:         core/lib/Thelia/Controller/Admin/ImportController.php
Fix translation domain in modales
	modifié:         templates/backOffice/default/ajax/export-modal.html
	modifié:         templates/backOffice/default/ajax/import-modal.html
hide category if no export/import and add module category
	modifié:         core/lib/Thelia/Config/Resources/export.xml
	modifié:         core/lib/Thelia/Config/Resources/import.xml
	modifié:         templates/backOffice/default/export.html
	modifié:         templates/backOffice/default/import.html
Merge pull request #565 from lovenunu/fix

Fix imports and exports