Facia tool: copy/paste

Allows copy/paste as an alternative to drag/drop. Works across separate windows. 

![fronts-tool](https://cloud.githubusercontent.com/assets/1147913/3656506/46048bf6-1187-11e4-9a40-78ec73563206.png)

know this is copied from `common`, but never really understood it. Why not just `return new EventEmitter()`?