Log Message:
Update 0.07 to 0.09
-------------------
0.09    CHANGES:
         * Added 'unzip_by'
         * Added 'nmax_by' and 'nmin_by' name aliases for 'max_by'/'min_by'

0.08    CHANGES:
         * Ensure that 'bundle_by' passes a short list to the body function
           rather than trailing undefs
         * Better hopefully-more efficient implementation of *sort_by.
         * Removed back-compat renames of sortby etc..