Emit the "draw" event after drawing the slice and before drawing the cur...

...sor.

In this way, the cursor will be drawn last, which means that it can't be hidden by custom user drawings.

This should fix #94!

Before / After
![capture decran 2014-08-11 a 15 53 54](https://cloud.githubusercontent.com/assets/1788596/3876772/5b7147bc-215f-11e4-99e8-81f58f68e620.png) ![capture decran 2014-08-11 a 15 54 07](https://cloud.githubusercontent.com/assets/1788596/3876773/5d7e2e08-215f-11e4-8e07-6ad1f8d0c6d4.png)