By Jeremy Gaunt ATHENS (Reuters) - A political calm before the storm enveloped election-weary Greece on Saturday with all campaigning and polling suspended ahead of Sunday's vote, which promised to be tight and possibly indecisive. The election is being watched closely from outside Greece because the winner will need to oversee deep economic reforms required for an 86-billion-euro (63.09 billion pounds) bailout brokered in August with Athens' euro zone partners. ...