moved computeFontMetrics up, so lint doesn't complain
moved computeFontMetrics up, so lint doesn't complain

jeresig/processing-js,baiyanghese/processing-js,jaredly/processing-js,guazipi/processing-js,kevinb7/processing-js,guazipi/processing-js,kevinb7/processing-js,jeresig/processing-js,jaredly/processing-js,baiyanghese/processing-js