Increased latest version to 1.2.4b0 [skip ci]

README.rst

 .. vim: set fileencoding=utf-8 :
 .. Tue 16 Aug 11:51:35 CEST 2016
 
-.. image:: http://img.shields.io/badge/docs-v1.2.3-yellow.svg
-   :target: https://www.idiap.ch/software/bob/docs/bob/bob.db.asvspoof/v1.2.3/index.html
+.. image:: http://img.shields.io/badge/docs-stable-yellow.svg
+   :target: https://www.idiap.ch/software/bob/docs/bob/bob.db.asvspoof/stable/index.html
 .. image:: http://img.shields.io/badge/docs-latest-orange.svg
    :target: https://www.idiap.ch/software/bob/docs/bob/bob.db.asvspoof/master/index.html
-.. image:: https://gitlab.idiap.ch/bob/bob.db.asvspoof/badges/v1.2.3/build.svg
-   :target: https://gitlab.idiap.ch/bob/bob.db.asvspoof/commits/v1.2.3
-.. image:: https://gitlab.idiap.ch/bob/bob.db.asvspoof/badges/v1.2.3/coverage.svg
-   :target: https://gitlab.idiap.ch/bob/bob.db.asvspoof/commits/v1.2.3
+.. image:: https://gitlab.idiap.ch/bob/bob.db.asvspoof/badges/master/build.svg
+   :target: https://gitlab.idiap.ch/bob/bob.db.asvspoof/commits/master
+.. image:: https://gitlab.idiap.ch/bob/bob.db.asvspoof/badges/master/coverage.svg
+   :target: https://gitlab.idiap.ch/bob/bob.db.asvspoof/commits/master
 .. image:: https://img.shields.io/badge/gitlab-project-0000c0.svg
    :target: https://gitlab.idiap.ch/bob/bob.db.asvspoof
 .. image:: http://img.shields.io/pypi/v/bob.db.asvspoof.svg

version.txt

-1.2.3
\ No newline at end of file
+1.2.4b0
\ No newline at end of file