Issue 57: proposal

Issue 57 (http://osoa.org/jira/browse/BPEL-57) says:

"Variable with sca-bpel:multiReference extension needs to be 
initialized/Set before it can be used to set the partner link endpoint 
reference. Specification does not say anything about variable 
initialization mechanism."

This issue was raised before some of the recent changes to the spec. 
Specifically the issue proposal from Najeeb that was accepted recently. 
The spec (cd02-rev4) says the following in Section 3.2:

"Variable with “sca-bpel:multiReference” extension is initialized by sca 
runtime using an implicit <from-spec> that uses an expression that 
points to a virtual sca runtime variable holding a list of endpoint 
references for the targets of the multi-reference represented by a 
partner link referencing this variable."

Given this statement in the spec, I think we can CNA this issue.

-Anish
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