Slate: add drag/drop support

[ianstormtaylor]

[oyeanuj]

DraftJS plugins that you referred to now has DnD support in their 2.0:

https://github.com/draft-js-plugins/draft-js-plugins/tree/master/draft-js-dnd-plugin

[ianstormtaylor]

Added to core in 0.6.3!

It's handled similarly to contenteditable, in that you specific blocks aren't draggable, but when you create a selection, you can drag that selection to somewhere else in the document. And things can be dragged from outside of the document, by default only text is handled, but plugins can hook into the onDrop handler.

[richardbross]

Where is the documentation for this functionality @ianstormtaylor