Improve the README file as requested by one reviewer of the paper.

README

 
-i2MassChroQ Copyright : © 2015, Olivier Langella, Filippo Rusconi
+i2MassChroQ 
+============
 
+Copyright : © 2015, Olivier Langella, Filippo Rusconi
 i2MassChroQ is distributed under the terms of the GNU General Public License (available in the COPYING file)
 
 i2MassChroQ (identification & inference -- mass chromatogram quantification) is
 the successor of X!TandemPipeline-Java. Following a full rewrite in C++17 and
-integration of the MassChroQ module, i2MassChroQ features a full-fledged
-quantitative proteomics solution.
+integration of the MassChroQ and MSstats modules, i2MassChroQ features a
+full-fledged quantitative proteomics solution.
+
+Home page
+---------
+
+The home page of the project is located at
+http://pappso.inrae.fr/en/bioinfo/i2masschroq/.
+
+User manual
+-----------
+
+The user documentation is available either in the shipped package or from the
+following pages:
+
+* HTML format: http://pappso.inrae.fr/en/bioinfo/i2masschroq/documentation/html/
+* PDF format: http://pappso.inrae.fr/en/bioinfo/i2masschroq/documentation/i2MassChroQ-doc.pdf
+
+Pre-compiled binaries
+---------------------
+
+The software is packaged for MS-Windows and for GNU/Linux (Debian/Ubuntu):
+
+* https://forgemia.inra.fr/pappso/i2masschroq/-/releases
+* http://pappso.inrae.fr/en/bioinfo/i2masschroq/download/ (instructions for
+  Debian/Ubuntu)
+
+Contributing code to i2MassChroQ
+--------------------------------
+
+* Contributions to i2MassChroQ are welcome. We accept pull requests.
+* The coding style should replicate that of the code being modified.
+
 
-More information on :
-http://pappso.inra.fr/bioinfo/i2masschroq