Add new feature for predated posts.

Now, you have the ability to publish predated posts automatically.
Add new feature for tagging posts.
Use a simple comma as tag delimiter.

Instead of a pipe.
Rename future post feature.

It's now called 'scheduled posts'. Also changes styling for checkbox admin panel with a mulitlined label.
Rename predated posts to Scheduled publishing.

Also changes styling for checkbox.
Merge branch 'feature/tagging'
Merge branch 'feature/future-posts'

Conflicts:
	dropplets/functions.php