Issue - 4 - Parallel For Each

In a separate post on issue 63 I discussed a possible new activity, 
foreach. It would seem a simple matter to create another new activity 
called parallelForEach which has the identical syntax to foreach but 
with the semantic that each iteration occurs in parallel instead of 
serially. There would be an implicit scope that would contain the 
declaration of each thread's iterator variable.

In terms of error handling and such the semantics for parallelForEach 
would be the same as for how errors in threads are handled in flows.

	Just a thought,

		Yaron