In this Swiss Alps town where the global elite have gathered to debate the world's problems, there seems to be little room on the radar for Africa, a continent of over a billion people where a commodity-fueled growth boom has soured with a vengeance. Sub-Saharan Africa's economies, described a few years ago by consultancy McKinsey as ?lions on the move.? likely expanded just 1.6 percent last year according to the World Bank ? the slowest rate in two decades and one that lags the continent's galloping population growth. This week, investors were reminded afresh of Africa's fragile record on democracy and governance ? joint African forces are preparing to oust Gambian leader Yahya Jammeh who...