It was not Santa or Father Frost, who dropped down from the chimney to Georgia on New Year’s Eve. It was a no-less proverbial character, the nation’s shadow ruler Bidzina Ivanishvili, who unexpectedly rolled into the light to announce that he was back to take the reins of power. Since then, the nation has been scratching its head, trying to figure out what drove the reclusive billionaire into the open. Dubbed the Third Coming, Ivanishvili’s latest appearance became the third episode in what seems like a quinquennial cycle, when the tycoon descends from his glassy, hilltop palace down to the ca…