Yoyo: ecm application improvements

I'm working on changes of the ecm application to handle larger B1 values for the elliptic curves and which runs only one curve and stage 1 and 2 in separated workunits. This allows us to attack an additional range of composites.Most changes on the backend are already done. But now the ecm application needs to be changed. Therefore no new workunits are issued. In the next days only resent and test wokunits will be available. The new workunits will have a P1 or P2 postfix.yoyo

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