PAUL LORGERIE and TIEMOKO DIALLO  MALI’S ruling junta pushed through a political charter on Saturday that could lead to the appointment of a soldier as interim president despite objections from the coalition that led anti-government protests before last month's coup. Approval for the roadmap, meant to chart the country's course after the August 18 coup that toppled President Ibrahim Boubacar Keita, came after three days of negotiations between the junta, political leaders and civil society groups. International powers, fearful that political instability will undermine a fight against Islamist militants across West Africa's Sahel region, have pushed for a swift transition…