INSTALL : 
After installing this BT, you should achieve some tasks :
1) On any delivery movement portal type which is not in erp5_trade, which can aggregate items and which isAccountable :
  a) run PortalType_ImmobilisationMovement_addAmortisationMethodActions directly on the portal type
  b) attach workflow immobilisation_movement_interaction_workflow

2) On any corresponding root delivery portal type :
  a) run PortalType_ImmobilisationDelivery_addImmobilisationActions  directly on the portal type
  b) attach workflows immobilisation_movement_interaction_workflow and immobilisation_workflow

3) On any item :
  a) run PortalType_Item_addImmobilisationActions directly on the portal type


TODO : 
- Handle currency changes in expand