Popover drawn in code

I've re-created the popover with PaintCode so the image assets are not needed and it's dynamic so the size of the popover can change and the popover will resize to fit. This would allow the length of the text to be longer, or the size of the font to be larger. More work would be needed to adjust the frame of the popover but the `drawRect` method is ready. 

Hope you find this patch useful!