Add command-line option --fps to display FPS.
Add command-line option --fps to display FPS.

julienr/vispy,srinathv/vispy,dchilds7/Deysha-Star-Formation,sbtlaarzc/vispy,RebeccaWPerry/vispy,kkuunnddaannkk/vispy,srinathv/vispy,RebeccaWPerry/vispy,QuLogic/vispy,ghisvail/vispy,sh4wn/vispy,hronoses/vispy,jay3sh/vispy,kkuunnddaannkk/vispy,sbtlaarzc/vispy,julienr/vispy,jay3sh/vispy,sh4wn/vispy,ghisvail/vispy,kkuunnddaannkk/vispy,QuLogic/vispy,sh4wn/vispy,drufat/vispy,michaelaye/vispy,hronoses/vispy,jdreaver/vispy,ghisvail/vispy,drufat/vispy,bollu/vispy,bollu/vispy,Eric89GXL/vispy,srinathv/vispy,Eric89GXL/vispy,michaelaye/vispy,jay3sh/vispy,julienr/vispy,dchilds7/Deysha-Star-Formation,jdreaver/vispy,inclement/vispy,sbtlaarzc/vispy,michaelaye/vispy,hronoses/vispy,inclement/vispy,drufat/vispy,inclement/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,QuLogic/vispy,Eric89GXL/vispy,bollu/vispy,jdreaver/vispy