Matthieu Vaxiviere will stay on with the Charouz-run Lotus team in Formula Renault 3.5 for 2015, joined by series returnee Meindert van Buuren.Vaxiviere finished eighth in FR3.5 last season, in a season that was interrupted by a back injury but featured two podiums after his return. The 20-year-old Frenchman also...