Some patches for xts

[Cyril Brulebois]

Hi,

this series should be somehow easy to review. That one might be a bit
controversial, but I'm proposing it anyway, just in case:

  [PATCH:xts 6/6] Remove old files from the TET3 import.

I was also tempted to merge Artistic and Licence into COPYING, but there
are *tons* of references in source files, so shrug…

BTW, it looks like TET is still alive:
  http://tetworks.opengroup.org/tet/

Are there any plans to update what got copied from tet 3.3?

Mraw,
KiBi.