creating tag

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_check_availability/tags/0.9@2485 950b781c-c544-efab-2f99-90083ee69683
API: adding 0.9 branches

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_check_availability/branches/0.9@2506 950b781c-c544-efab-2f99-90083ee69683