added webkit-specific centering for selector glyphs
added webkit-specific centering for selector glyphs

CapeSepias/fontello,vinod1988/fontello,marcia-kubik/fontello,liguangmings/fontello,Sivalingaamorthy/fontello,bartuspan/fontello,SKing7/fontellomt,blackgirl/fontello,Sivalingaamorthy/fontello,modulexcite/fontello,CapeSepias/fontello,Sivalingaamorthy/fontello,modulexcite/fontello,marcia-kubik/fontello,CapeSepias/fontello,fontello/fontello,liguangmings/fontello,asrin475/fontello,asrin475/fontello,cnbin/fontello,modulexcite/fontello,katgironpe/fontello,fontello/fontello,cnbin/fontello,bartuspan/fontello,asrin475/fontello,marcia-kubik/fontello,katgironpe/fontello,SKing7/fontellomt,liguangmings/fontello,blackgirl/fontello,bartuspan/fontello,katgironpe/fontello,vinod1988/fontello,fontello/fontello,blackgirl/fontello,cnbin/fontello,vinod1988/fontello