Fixed issue with hours not appearing from projects

  for the final V3.5 release

- changed version numbers

	- Disabling "tax" field if not desired
	- Implemented material_id in im_invoice_lines

	- Implemented company-wide bank holidays
	- Extended invoices to check the CostCenter before
	  creating an invoice
	- Implemented custom number circuits for EconoMedic
	- Implemented controlling by day
	- Implemented invoicing by day
	- Implemented conversion function from hours to days,
	  limiting the number of days logged per consultant
	  to 1.
	- Implemented OpenOffice invoicing templates
	- Implemented Template maintenance page in /intranet/admin/
	- Improved filtering in AbsenceListPage

- Fixed issue with invoice_hour_type error during timesheet invoicing