Increased stable version to 4.0.0

README.rst

 .. vim: set fileencoding=utf-8 :
 .. Thu May  4 16:29:23 CEST 2017
 
-.. image:: https://img.shields.io/badge/docs-latest-orange.svg
-   :target: https://www.idiap.ch/software/bob/docs/bob/bob.pad.face/master/index.html
-.. image:: https://gitlab.idiap.ch/bob/bob.pad.face/badges/master/pipeline.svg
-   :target: https://gitlab.idiap.ch/bob/bob.pad.face/commits/master
-.. image:: https://gitlab.idiap.ch/bob/bob.pad.face/badges/master/coverage.svg
-   :target: https://gitlab.idiap.ch/bob/bob.pad.face/commits/master
+.. image:: https://img.shields.io/badge/docs-v4.0.0-orange.svg
+   :target: https://www.idiap.ch/software/bob/docs/bob/bob.pad.face/v4.0.0/index.html
+.. image:: https://gitlab.idiap.ch/bob/bob.pad.face/badges/v4.0.0/pipeline.svg
+   :target: https://gitlab.idiap.ch/bob/bob.pad.face/commits/v4.0.0
+.. image:: https://gitlab.idiap.ch/bob/bob.pad.face/badges/v4.0.0/coverage.svg
+   :target: https://gitlab.idiap.ch/bob/bob.pad.face/commits/v4.0.0
 .. image:: https://img.shields.io/badge/gitlab-project-0000c0.svg
    :target: https://gitlab.idiap.ch/bob/bob.pad.face
 

version.txt

-3.1.1b0
+4.0.0