YAXT

This version presents an overhaul of multiple data paths in the intersection computation that is the basis of Xmap construction.

This release should work as a drop-in replacement for previous versions and only make Xmap creation faster.
In case an unexpected bug got through and you experience performance degradation of any kind, we'd like to hear of that.

New functionality is a choice of sorting algorithm and customizable bucket generation in the distributed directory employed in xt_xmap_dist_dir_new.