upgrade email system+discussion

(this may evolve into blueprint?)

much of this will help address convert system emails to flexmail system

  --Ethan McCutchen.....Wed Mar 09 11:23:00 -0800 2011

note, the upgrade path is pretty straightforward. We basically just have to change *send to '*on create' and change the type of all its values to Email (or whatever it ends up being named)

  --Ethan McCutchen.....Wed Mar 09 11:59:22 -0800 2011

note, it may also be nice to be able to use inclusions in email fields, but that will require more nuanced rendering -- we can't currently render inclusions without also converting emails into mailto links, which would break things.

  --Ethan McCutchen.....Wed Mar 09 12:16:53 -0800 2011

Ethan noted elsewhere that in addition to "*on create" we'll want "*on update" and "*on delete" (and possibly *on read). Once we do drafts we'll want *on publish as well.

changing this to a ticket, since so much of it has been implemented, but not everything on this will necessarily go into Wagn 1.14.