Trigger before/around/after stuff

Sartak, frodwith,

So I was looking over the trigger before/after/around patches and  
something occurred to me, trigger always expects a fully formed  
instance (I know all my uses do) and with the before/after/around  
trigger that is just not possible, especially for trigger at  
construction time.

So unfortunately this means we need to remove this patch and rethink  
this feature.

- Stevan