[gbrainy] Bump version to version 2.20

[Jordi Mas <jmas src gnome org>]

commit f96235e7932b81a246f2aeb0791b420fb0156e7b
Author: Jordi Mas <jmas softcatala org>
Date:   Sun Apr 14 23:28:44 2013 +0200

    Bump version to version 2.20

 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4eb2ee5..7bf417c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 # Define gbrainy version
 m4_define([gbrainy_version_major], [2])
-m4_define([gbrainy_version_minor], [1])
-m4_define([gbrainy_version_revision], [99])
+m4_define([gbrainy_version_minor], [2])
+m4_define([gbrainy_version_revision], [0])
 
 m4_define([concat], $1$2$3$4)