Reset all pickers with a single button click [jQuery version]

Hi,

I'm using the jQuery version and have multiple pickers on the page, like:

```
var cp_picker = cp_input.colorPicker({ ... }),
cp_picker2 = cp_input2.colorPicker({ ... }),
...
```

Then I would like to add a `<input type="button" ... />` at the bottom of the page to reset all these pickers to their default colors.

How this can be acheived please ?
