o DEVICES: Added support for all Cairo* devices of the Cairo package.
o Several functions now supports specifying device type names by
  regular expressions, e.g. devOptions("cairo_.*") and
  devEval("cairo_.*", name="foo", { plot(1:10) }).  The latter will
  output one image file for each available cairo_.* device.
Dropping interactive Cairo.* (i.e. CairoWin and CairoX11) devices for now.