Add unpublish command

[nmenag]

would be good implement the command unpublish for the posts, for a post and convert it into a draft.

[parkr]

There is also a "published" flag... I am not sure what most Jekyll users would prefer. drafts, or the published yaml front matter flag?

[courajs]

I think moving back to drafts makes more sense. Makes it the proper inverse of the publish command.
There could be a retract command or something similar if anyone wants that, but that is very easy to do manually. I see jekyll compose mostly as a tool for avoiding typing dates in the filenames, or having to type _awkward _underscore _dirs.

[parkr]

🆒 👍

[nmenag]

equal to Octopress:

New draft https://github.com/octopress/octopress#new-draft
Publish draft https://github.com/octopress/octopress#publish-a-draft
And unpublish post https://github.com/octopress/octopress#unpublish-a-post

[courajs]

That's probably a pretty good thing? This is supposed to be lighter-weight, and doesn't add any artifacts to your project.

[courajs]

Added by #26