LONDON (Reuters) - Gold miners Endeavour and Centamin have agreed to assess the feasibility of a merger, following a weekend meeting between top managers of the two companies, Endeavour said on Monday, driving Centamin's share price higher.The gold industry has seen a flurry of deals over the last year as companies attempt to squeeze value from operations after years of subdued activity and low returns.Canada's Endeavour, whose business is focused on West Africa, is seeking to gain control of..