ANDREA SHALAL  The head of the IMF has urged advanced economies to provide more resources to low-income countries, warning of an emerging "Great Divergence" in global growth that could risk stability and trigger social unrest for years to come. International Monetary Fund Managing Director Kristalina Georgieva told reporters that 50% of developing countries were at risk of falling further behind, which raised concerns about stability and social unrest. To avert bigger problems, she said rich countries and international institutions should chip in more. She also urged heavily indebted countries to seek debt restructuring sooner rather than later, and to boost…