Villager'Visionary'.Winner'.The master is back. And he is back to his supremely different ways. To his credit, the muse sparkles brilliantly as if clay turning into a priceless mural. The promo of Mani Rathnam's 'Guru' is a spellbinding experience that leaves you stunned. For it is a treatise in transition from a simple villager taking pleasure in honking a school bell, climbing the temple stairs to an ambitious businessman who enthuses his workers …