[Seaside] Upgrading to 2.5a-avi.3

[Colin Curtin]

> You have to implement the class side method #canBeRoot, and have it 
> return true.  Having a menu of every WAComponent was getting very 
> unwieldy.
>
Thank you for the quick response! Additionally, it seems that 
WAComponent>>#activeComponent and #activeController are both broken, as 
they try to call 'self delegate' when no such message exists (in either 
WAComponent or WAPresenter).

Colin