goal drawing not working

when i try to to do goals i get a i is not defind error i think the error is in 

```
drawGoal: (path) ->
  @raphael.path(path)
    .attr('stroke', @options.goalLineColors[i % @options.goalLineColors.length])
    .attr('stroke-width', @options.goalStrokeWidth)
```

no where in that code is i defind but it is still used guess it was forgot about when extraction drawGoal from drawGoals
