Make minor improvements and fix bugs

- module -T: fixed -domain cylinder and circle, fixed tesr reading, made minor
  fixes.
- module -M: fixed -elset, fixed -statelset group -elt hex, fixed -statnode
  col_stdtriangle, fixed -statelt part in 2D, added -faset for -format inp.
- module -V: fixed -datacellcolscheme ipf for -crysym hexagonal, fixed
  -space [i]pf png output.
- general: added tutorial "Installing Neper on Ubuntu 22", updated tests to
  pass on Ubuntu 22, made minor compilation fix.

VERSIONS

@@ -1,11 +1,12 @@
-New in 4.6.1-15 (12 Sep 2023):
+New in 4.6.1 (12 Sep 2023):
 - module -T: fixed -domain cylinder and circle, fixed tesr reading, made minor
   fixes.
 - module -M: fixed -elset, fixed -statelset group -elt hex, fixed -statnode
   col_stdtriangle, fixed -statelt part in 2D, added -faset for -format inp.
 - module -V: fixed -datacellcolscheme ipf for -crysym hexagonal, fixed
   -space [i]pf png output.
-- general: updated tests to pass on Ubuntu 22, made minor compilation fix.
+- general: added tutorial "Installing Neper on Ubuntu 22", updated tests to
+  pass on Ubuntu 22, made minor compilation fix.
 
 New in 4.6.0 (06 Apr 2023):
 - module -T: fixed truncated statistical distributions (from and to), improved

doc/conf.py

@@ -11,8 +11,8 @@
 import sphinx_rtd_theme
 
 project = u'Neper'
-version = u'4.6.1-15'
-release = u'4.6.1-15'
+version = u'4.6.1'
+release = u'4.6.1'
 author = u'Romain Quey'
 copyright = u'Romain Quey'
 language = 'en'

doc/introduction.rst

@@ -52,10 +52,14 @@ Several, complementary resources describing Neper are available:
 
 Resources for FEPX can be accessed from https://fepx.info.
 
+.. _installing_neper:
+
 Installing Neper
 ----------------
 
-Neper is written in (mostly ANSI) C and a little C++, and it can run on any Unix-like system (including macOS).  Neper also runs on Microsoft Windows using the Windows subsystem for Linux (WSL), the Ubuntu app or similar solutions, although we do not test nor support this usage and multithreading must be turned off (which slows down execution significantly).
+Neper is written in (mostly ANSI) C and a little C++, and it can run on any Unix-like system.  Neper is also known to run on macOS and on Microsoft Windows using the Windows subsystem for Linux (WSL), the Ubuntu app or similar solutions, although we do not test nor support this usage and multithreading must be turned off (which slows down execution significantly).
+
+.. note:: Ubuntu users may be interested in the tutorial ":ref:`installation_ubuntu_22`" from step-by-step installation instructions.
 
 General Procedure
 ~~~~~~~~~~~~~~~~~
@@ -156,6 +160,8 @@ The program configuration variables concern the printing format of the real numb
 - :code:`REAL_PRINT_FORMAT3`, default :code:`"%15.12f"` (12 decimal digits, 15 total digits);
 - :code:`REAL_PRINT_FORMAT5`, default :code:`"%17.12f"` (12 decimal digits, 17 total digits).
 
+.. _testing_neper:
+
 Testing Neper
 -------------
 

doc/tutorials.rst

@@ -14,3 +14,4 @@ Tutorials
    tutorials/pole_figure.rst
    tutorials/orientation_trajectories.rst
    tutorials/orientation_color_key.rst
+   tutorials/install_ubuntu22.rst