CREATING 2.4 TAG FOR ecommerce_check_availability

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_check_availability/tags/2.4@3764 950b781c-c544-efab-2f99-90083ee69683
API: new ways to do emails

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_check_availability/tags/2.4@3919 950b781c-c544-efab-2f99-90083ee69683
API: email improvements

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_check_availability/tags/2.4@3938 950b781c-c544-efab-2f99-90083ee69683
MOVING TAG to BRANCH

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_check_availability/branches/2.4@4344 950b781c-c544-efab-2f99-90083ee69683
Updating composer.json files to correct reference to e-commerce

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_check_availability/branches/2.4@4656 950b781c-c544-efab-2f99-90083ee69683