Support NODE_DEBUG

[strugee]

We need to do this across modules.

[strugee]

Here's a list of repositories we need to do this for:

• [ ] stratic-handle-offset
• [ ] stratic-decorate-files
• [ ] stratic-date-in-path
• [ ] stratic-paginate-indexes
• [ ] stratic-indexes-to-rss
• [ ] stratic-posts-to-index
• [ ] stratic-filter-drafts
• [ ] gulp-attach-to-template
• [ ] stratic-default-categories
• [ ] stratic-truncate-indexes