PEOPLE ON THE MARGINS   Thakur Ripudaman Singh was restlessly strolling around his Chaupal. There were expressions of worry and irritation on his face. For generations, the people of Ramangala had been working as labourers on his farms. Whatever Thakur Sahab gave them; they took it and never complained. But the wind had changed since the last election. In all the elections that have been held to date, the people of Ramangala blindly supported the candidate for whom Ripudaman Singh gave orders. But in this election, despite Ripudaman's repeated threats, they did not vote for Ripudaman's candidate but voted for