Drag And Drop Replaces Contents

[badVibes--]

Dragging anything a webView accepts causes the editor to be replaced with the dragged item.

Drag and drop operations should be either disabled or overridden to accept only text files and set the content of the editor instead of the webView.

[faceleg]

Excellent point - mind submitting a PR?

[taylorconor]

#37

[faceleg]

I'm going to leave this open as I think being able to drop files into the view and have them replace the ace editor content would be useful.

Thanks for the PR!