Add touch event on OS X
Add touch event on OS X

michaelaye/vispy,drufat/vispy,Eric89GXL/vispy,ghisvail/vispy,Eric89GXL/vispy,Eric89GXL/vispy,michaelaye/vispy,michaelaye/vispy,drufat/vispy,ghisvail/vispy,ghisvail/vispy,drufat/vispy