Added new parameter to round scripts. This is usefull to round that values in a different way for begin and the end of the block.
See: http://www.erp5.org/Discussion/DateRange

Is required to update erp5_core revision to 792 (r20504) or more. 


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@20505 20353a03-c40f-0410-a6d1-a30d3c3de9de