Add users_id method to Interchange6::Cart.
Reference Interchange6::Schema in description.
Bump up version number.
Prepare Changes and README files for upcoming release.
Extend users_id method to allow setting the users id.
Allow users_id to be unset as well.
Add sessions_id method.
Add prerequisite on Test::Warnings.
Split up prerequisites into BUILD_REQUIRES and PREREQ_PM.
Add tests for users_id and sessions_id methods of Interchange6::Cart class.
Bump up version number.
Prepare Changes and README files for upcoming release.
Fix syntax error in Makefile.PL.
Prevent Perl warning from cart test script.