options within each template for common choices

[jeremybmerrill]

1.) truncated body text in listView 2.) show attachments? 3.) show original document (in listView and in detailView) 4.) exclude file.file and analyzed.body from fields in search query (for document sets with very large documents in htem)

[jeremybmerrill]

this is maybe already in progress? options.show_whole_body: https://github.com/newsdev/stevedore/blob/master/templates/list_view/email.template#L11