- Changed some behaviors : use immobilisation periods calculated in...

- Changed some behaviors : use immobilisation periods calculated in ImmobilisableItem, allow monthly amortisation.
- Changed simulation movement generation to be compliant with "section changes but not actual owner" cases
- Handle "continuing" amortisation methods
- Some bug fixes


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5884 20353a03-c40f-0410-a6d1-a30d3c3de9de