[VOTE] Make ProcessingException extend CascadingRuntimeException

[Ugo Cei]

I think everyone interested has had the option of venting his opinion 
on the subject of checked vs. unchecked exceptions. For the record, 
here [1] is the relevant thread.

In order to move forward, I propose to reparent the 
org.apache.cocoon.ProcessingException to extend 
org.apache.avalon.framework.CascadingRuntimeException instead of 
CascadingException.

The change is backward-compatible and is a one-line change that can be 
reverted easily, but might have implications on the way we manage 
exceptions in the future.

I've already performed the change locally and everything compiles. 
Tests fail, but they failed also before the change :-(.

So, please cast your votes.

	Ugo

[1] http://marc.theaimsgroup.com/?t=108188608400002&r=1&w=2