Export CSV including hidden series

[absessive]

I've been trying to export CSV for a chart with one series hidden visible: false, however that only exports visible series. The requirement is that the additional series should not be visible until its in CSV (especially in charts with many series).

Fiddle: http://jsfiddle.net/absessive/cqjvD/1109/

[TorsteinHonsi]

Thanks for your suggestion! Currently we are checking for visible: false because there was an error in issue #55 with hidden series. The problem is that for hidden series, the data is not always processed at all, so we couldn't export from the processed data.