Change how ChooseInformation handles associations - needs to be able to summarize for the selections, but not assume that the summarization is only from the one item.  So method of gather/format was changed

Issue#: CODE-2473


git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@23235 ef53c05b-3124-4d59-ae7d-fe3273f42be7