* use parallel MultiListField to specify Membership Categories for each category instead of using a single long MultiListField for all categories.
* display fallback category id instead of own id for using fallback cases (eg. region/europe for source_region categories).
  * update test to follow this change.
* add LinesField to specify Membership Values (eg. source/person_module/123).
  * add an external validator for this field.
* accept filter argument in getMembershipCriterionCategoryList to return categories only or documents only for membership values.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26643 20353a03-c40f-0410-a6d1-a30d3c3de9de