Added rudimentary key event to Qt. fsaa demo uses it.
Added rudimentary key event to Qt. fsaa demo uses it.

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