By popular demand, give user a choice of where to get the next set of
(initial) parameters for a new run. Three choices right now; from the template itself, from the instance, or from the previous run. On the web interface this is presented as three buttons. On ops, it is the the -y option, which takes one of template,instance,lastrun as its argument (you can of course combine the -y option with an XML file to override specific params). At present, there is no default. Lets give it a chance to sink in before I pick something that will annoy 50% of the people 75% of the time.
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