Hotfix: incorrect package version (#502)

Author: MatthijsBurgh

orocos_kdl/package.xml

@@ -4,7 +4,7 @@
   schematypens="http://www.w3.org/2001/XMLSchema"?>
 <package format="3">
   <name>orocos_kdl</name>
-  <version>1.5.3-dev</version>
+  <version>1.5.3</version>
   <description>
     This package contains a recent version of the Kinematics and Dynamics
     Library (KDL), distributed by the Orocos Project.