Improved format of the configuration module used for tests, and updated tests accordingly.
Updated copyright year.
Removed 'all_subscribers_list_id' from new().

'all_subscribers_list_id' was previously required due to an architectural
choice, but I've since refactored the controller/api separation and it
isn't used anymore.
Deprecated Email::ExactTarget->get_all_subscribers_list_id().

Will remove in a couple of months.
Removed duplicate test.
Cleaned up test.
Fixed test.

VersionInfo is deprecated by ExactTarget, and the format apparently changed.
Refactored test.
Allow return undef.
Added Test::Type to the dependencies.