We've seen many last chance summits on Greece - but none under the duress of banks being shut for two whole weeks. As eurozone finance ministers crunch the numbers, Germany's finance minister seemed to soften his tone, acknowledging that Greece's debt is unsustainable. Could François Hollande be the unsung hero of a possible deal - by pacifying the Germans, and sending technical advisors to Athens to help the Greeks draw up their proposals for creditors?