Side effect of the XDS update

If:

- you are in the habit of running xia2 where your images are (i.e. xia2 -3d `pwd`)

- you are in the habit of running xia2 more than once

you may notice a couple of odd lines in the output about unmatched parenthesis. This is a side-effect of XDS now using .cbf files for intermediate data, which look a lot like data to xia2 but are not meaningful.

Other than complaining the data reduction goes fine. I will add a trap for this as soon as I figure a reliable way for spotting the difference.