Sort option for blog entry

[jmjeong]

Each blog entry has date and updated field. Sometime it is useful to sort article by 'updated' field.

How about adding blog_sort_date whcih specifies how to sort the blog entry? blog_sort_date may have two options : "sort_by_post_date", "sort_by_modified_date"

[douglatornell]

This could be added as an option to the blogofile blog post list command in the blogofile_blog plugin.