Added alpha value to set_clear_color
Added alpha value to set_clear_color

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