Added support for 13-digit ISBNs with the 979 prefix
Added option for users when updating their mailing address to propagate that address change to their orders as well.
Modified setting class to allow custom settings to store data without first specifying data type
Bug fix: When selecting a pricing rule set from the pricing rule tester, that value is now respected Bug fix: API users that have non-standard rule sets selected will no longer pull from cached pricing values
Security upgrade: utilize .htaccess to not allow directory content listings
ISBN Custom Price and ISBN Blacklist now strip non-ASCII characters from upload column header field names to better support UTF-8 files with BOM headers
Added code to more efficiently process custom ISBN .csv uploads
Added internal tracking of Stamps void function error messages
Added function to automatically void Stamps.com labels that have not been used within a user-defined period of time.
Bug fix: Do not show button for stamps.com label generation when all other choices fail if stamps.com is not enabled for label generation on the sell-receipt page.