pspp-1.6.0 released [stable]

I'm very pleased to announce the release of a new version of GNU PSPP.
PSPP is a program for statistical analysis of sampled data.  It is a
free replacement for the proprietary program SPSS.

Here are the compressed sources and a GPG detached signature[*]:
  https://ftp.gnu.org/gnu/pspp/pspp-1.6.0.tar.gz
  https://ftp.gnu.org/gnu/pspp/pspp-1.6.0.tar.gz.sig

Use a mirror for higher download bandwidth:
  http://www.gnu.org/order/ftp.html

[*] Use a .sig file to verify that the corresponding file (without the
.sig suffix) is intact.  First, be sure to download both the .sig file
and the corresponding tarball.  Then, run a command like this:

  gpg --verify pspp-1.6.0.tar.gz.sig

If that command fails because you don't have the required public key,
then run this command to import it:

  gpg --keyserver keys.gnupg.net --recv-keys 85199DE8C6648E90

and rerun the 'gpg --verify' command.

Changes from 1.4.1 to 1.6.0:

 * In the Kruskal-Wallis test, a misleading result could occur
   if the lower bound specified by the user was in fact higher
   than the upper bound specified.  This has been fixed.

 * The DEFINE, MATRIX, MCONVERT, and MATRIX DATA commands are now
   implemented.

 * An error in the displayed signficance of oneway anova
   contrasts tests has been corrected.

 * Added Drag-N-Drop in output view.

 * The Explore GUI dialog supports the "Plots" subdialog. Boxplots, Q-Q Plots
   and Spreadlevel plots are now also available via the GUI.

 * The graphical user interface for importing spreadsheets has been improved.
   The new interface provides the user with a preview of the data to be imported
   and interactive methods to select the desired ranges.

 * The user manual, in its Info and HTML versions, now includes
   graphical output examples and screenshots.

 * New command SHOW SYSTEM to easily print system information useful
   in bug reports.

 * Build changes:

   - Perl is no longer required to build.

   - Build now requires Python 3.4 or later.  (Building PSPP 1.4.0
     also required Python, but it wasn't properly documented at the
     time.)

   - The Cairo and Pango libraries are now required.

   - gettext 0.20 or later is now required.

   - gtksourceview 4.x is now supported (3.x also remains supported).

 * Output improvements:

   - New drivers for output to TeX source files and to PNG files.

   - Table output styles may now be set with the new option
     --table-look and the new SET TLOOK command.

   - New driver option "trim" to remove empty space from PDF,
     PostScript, SVG, and PNG output files.

   - The PDF output driver now adds an outline to allow PDF viewers to display
     as a "table of contents" for the file.

   - The HTML output driver has a new option "bare".

 * New features in pspp-output:

   - New --table-look and --nth-commands options.

   - New get-table-look and convert-table-look commands.