move default_calculation_script_id property from PaySheetModel to TradeCondition. Rename it as calculation_script_id to be consistent with TradeModelLine.
Now PaySheetModelLine propertysheet became useless, so remove it


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27860 20353a03-c40f-0410-a6d1-a30d3c3de9de

add a new property create_line used to indicate if we want to create movement corresponding to this model line or not.
This is usefull in case of "intermediate lines" : a line we want to participe on some base_amount without being created.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27365 20353a03-c40f-0410-a6d1-a30d3c3de9de

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git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26560 20353a03-c40f-0410-a6d1-a30d3c3de9de

 - NodeBudgetVariation that explicitly lists the possible values one by one,
   either by selecting them of specifying a script to return this list of
   values
 - CategoryBudgetVariation that uses a base category
for each one, you specify what will be the "axis" used for getInventory (node,
mirror_node, node_category etc)

"SectionCategoryBudgetVariation" is therefore useless, it's a
CategoryBudgetVariation where the axis is "section_category"

Budget Cell, Budget Line and now Budget itself can be variated
 


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25611 20353a03-c40f-0410-a6d1-a30d3c3de9de

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