### 21 Jul 2017

HOWTO make AFNI utilities in csurf work on Ubuntu 16.04

Ubuntu 16.04 is missing libXp, a tiny library for printing from X11,
which is required/linked by AFNI utilities included in this distribution.
Since AFNI utilities (e.g., 2swap) are used in several key places,
the missing libXp will disable csurf.

The libXp shared lib isn't available in the 16.04 archives, so here is
how to install the working version from Ubuntu 15.  Get the .deb file
from one of these places:

  https://launchpad.net/ubuntu/+archive/primary/+files/libxp6_1.0.2-2_amd64.deb
  https://pages.ucsd.edu/~msereno/csurf/libs/libxp6_1.0.2-2_amd64.deb

Install it like this:

  sudo dpkg -i libxp6_1.0.2-2_amd64.deb