container stuff

[Jonathan M Davis]

Looks interesting overall. There is one function, however, which makes no 
sense to me: removeElement()/stableRemoveElement().

So, it basically removes a random element from the container? It could be 
quite consistent as to which element it removes from the container (it being 
implementation-dependent), but effectively, it removes a random element? 
What's the point of that? I can't remember the last time - if ever - that I 
wanted to remove an element from a container and I didn't care which. Or am 
I misunderstanding what it does?

- Jonathan M Davis