Three decades after seizing power in a military coup, Muhammadu Buhari has became the first Nigerian to oust a president through the ballot box. <br /><br /> And so far at least there is celebration rather than unrest on the streets.<br /><br /> As the scale of this weekend’s electoral landslide became clear, Buhari’s opposition party said that incumbent Goodluck Jonathan had called his victorious rival to concede defeat. <br /><br /> That should ease tensions.<br /><br /> Post-election violence in 2011 when Buhari, a Muslim northerner, last challenged Jonathan, a Christian southerner, left some 800 people dead. <br /><br /> He has now comfortably beaten Jonathan whose perceived slow reaction to the kidnapping of more than 200 schoolgirls last April caused widespread anger, fuelling a public appetite for decisive military action against Boko Haram Islamists from a strongman such as Buhari.<br /><br /> Despite some technical glitches and the killing of more than a dozen voters by Boko Haram gunmen, this election has been the smoothest and most o
