Add Australian regions to the default list.

The regions have been added to the data-install-1.6.0.0.php file to
ensure better forward compatibility with future versions of Magento,
which may create new versions of the Mage_Directory module and will
overwrite anything we put in here.

If you are already running an existing website you can add these regions
by installing the Fontis_Australia extension, or adding the regions
individually.