This melpa.org page suggests that the scad-mode package is installable from a package repository. But I tried adding http://marmalade-repo.org/ to my package archives, but
scad-mode still doesn't show up in list-packages. Is this page incorrect? I now have
'(package-archives (quote (("gnu" . "http://elpa.gnu.org/packages/") ("melpa-stable" . "http://stable.melpa.org/packages/") ("marmalade" . "http://marmalade-repo.org/packages"))))
And in the description, isn't the correct syntax
M-x package-intstall, not M-x install-package`?