[Dev] Action items from collections code/design review

[Ted Leung]

The action items that we agreed on at the collections code/design  
review are here: <http://wiki.osafoundation.org/bin/view/Journal/ 
TedLeung20050912>

One of the items is to move away from use of onValueChanged and go  
back to using constructors for creating various collection kinds.   
Unfortunately, this
means that we wouldn't be able to use update to change existing  
instances in the repository.   So we can't remove the onValueChanged  
stuff, so it  doesn't
make sense to duplicate the code in the collection item  
constructors.  So I'm just going to leave the code the way that it is  
now.

Ted