Use case: User wants to replicate and then tweak some block of BPEL code.

Today - this is only possible in BPEL source view.

Recommendation - support copy and paste in diagram view.

Issues: 
- We only support single selection today. Is that sufficient for most copy/paste
needs? I think so, particularly, since users can select the biggest container in
diagram to meet their needs. Or perform > 1 copy and paste if they need
non-contiguous pieces of diagram.



- What should be done with names of pasted elements. I believe they will be
auto-incrmented by the existing system and that should be sufficient.

- What should be done with all of the context sensitive aspects on paste?
--------- variable,correlation set, declarations (if you are copying a scope
--------- variable, correlation set references in other copied objects, like
Recieve, Reply, Assigns. 
This is the trickiest part of this issue. One option is that we do nothing
during first phase and let validation system indicate to users what needs to be
adjusted.