[table view] some new table view enhancements * rewrite entiy table view column renderers to use default_* methods instead of lambda so that column_renderers may be properly deep-copied * new RelatedEntitiesColRenderer * default addcount to false on RelatedEntityColRenderer * more doc

from yams.buildobjs import RelationDefinition

class ARelation(RelationDefinition):
    subject = 'CWUser'
    object = 'CWGroup'