cf-sketch.pl: add --install-all option and refactor the API interactions a little
cf-sketch.pl: add --install-all option and refactor the API interactions a little

bdurrow/design-center,bdurrow/design-center,bdurrow/design-center,tzz/design-center,tzz/design-center,tzz/design-center,bdurrow/design-center,tzz/design-center