I just upgraded a chunk of the theme (Bootstrap and jQuery) and swapped it from CSS to SCSS. People can upgrade by downloading it, and working out which assets to copy-paste into their own site, but it needs a bit of knowledge of Jekyll. For example, the config file sets the sass_dir to one in the theme, so you need to do more than just copy the theme dir.
The obvious solution is to make the theme a gem.
I just upgraded a chunk of the theme (Bootstrap and jQuery) and swapped it from CSS to SCSS. People can upgrade by downloading it, and working out which assets to copy-paste into their own site, but it needs a bit of knowledge of Jekyll. For example, the config file sets the sass_dir to one in the theme, so you need to do more than just copy the theme dir.
The obvious solution is to make the theme a gem.