add example using colorbar_widget
add example using colorbar_widget

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