setup ignore for Xcode in preparation for example project
setup ignore for Xcode in preparation for example project

hyperoslo/SevenSwitch,Foboz/SevenSwitch,hyperoslo/SevenSwitch,bvogelzang/SevenSwitch,ERussel/SevenSwitch,ippy04/SevenSwitch,lammertw/SevenSwitch,pittsburgh-studio/SevenSwitch,lammertw/SevenSwitch,cmds4410/SevenSwitch,ippy04/SevenSwitch,sashkasashkin/SevenSwitch,oskycar/SevenSwitch