[FIX] year tag of vat declaration wizard: used first 4 char of date instead of last 4 char of name, because name can be manually changed by user!
[FIX] year tag of vat listing  wizard: used first 4 char of date instead of last 4 char of name, because name can be manually changed by user!                   
[FIX] vat listing wizard is now based on account_periods and not dates!
[FIX] vat listing is only for belgian customers
[FIX] vat listing was wrongly filled (amount and turnover tags were sometimes switched): fixed and improved readability

[IMP] cleaning of vat listing
[IMP] improved the menuitems structure and names more explicit

bzr revid: qdp@tinyerp.com-20090205131841-ahs0xr30ukmybcdq