* Add contributors to README
* try to find a FY start date according to the start date from choosen period
* Unable to unlink a date_range with type fiscal_year
* `fiscal_year` flag readonly
* add menu to date_range under accounting section
* remove method on object because it's the same as in file
* unable to delete with flag 'fiscal_year' but can delete
* clean __openerp__.py
* account_fiscal_year version number
