BUGFIX: clear requirements

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/branches/2.5@4704 950b781c-c544-efab-2f99-90083ee69683
ADDING currecny to orderform

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/branches/2.5@4706 950b781c-c544-efab-2f99-90083ee69683