Add drag decorator

[ceremcem]

Note to myself: Add this fiddle as "dragging decorator", like in this example: http://jsfiddle.net/h9j2hdyj/7/

[fskreuz]

I'd like to keep the examples in Plugins as small and simple as possible. This might be good content for a dedicated examples page, which I'm thinking of making.

Also, feel free to send a PR. 😁

[ceremcem]

@fskreuz Reading my post again, the sentence I used has an imperative mood, but it was actually "Note to myself" kind issue. I would like to mention just in case :)

You might remember that I'm working on a CAD idea and this is the core property (for this project and many other projects). So it was definitely a "note to myself" type of issue :)

[fskreuz]

Oh, hahaha. 😁 I should make a label for it.