Action/profile refactoring

[Marvin S. Addison]

> you should take any of my examples as
> nothing but copying existing examples in the code base, and those are mock
> ups as much as anything.

Understood.

 > I think I'm happy with the overall syntax, but
> have no strong feelings about the bean names or events. (I think our
> events are lower case, though?)

I looked primarily at net.shibboleth.idp.profile.EventIds, which shows 
uppercase event IDs for custom actions, while using the SWF default 
"proceed."

> One leftover issue is whether to keep the more complex EventContext model
> for returning events indirectly, or just use String and be done with it

I really liked the current approach that allows both. I made use of an 
event with attributes in the CAS protocol work, and it seems like a 
reasonable case to support.

M