Log Message:
Update to 0.612:

0.612 Mon Aug 16 00:10:16 2010 +1000    <joe@kafsemo.org>
        - Allow DATA_INDENT to specify arbitrary white space for
           indentation. If it is numeric then use that many space
           characters.

0.611 Thu Apr 22 13:09:12 BST 2010    <joe@kafsemo.org>
        - Adopt rewritten license text to explicitly allow modification.

0.610 Mon Mar 29 02:29:32 BST 2010    <joe@kafsemo.org>
        - Add a CHECK_PRINT constructor parameter to check the output print
           success (#50465). It will croak when printing to output fails.

0.607 Mon Mar 22 14:46:26 GMT 2010    <joe@kafsemo.org>
        - Address license confusion by reverting to the original
           license, with contributor permission, and removing
           unintentional references to the (more restrictive)
           GPL/Artistic.