1.3.8 released

Add a MessageLogger interface which the MessageArea interface extends
Add the char and short types for command-line arguments
Add a new properties argument type for command-line arguments allowing to put arguments (key, value) pairs in a properties file
Fix the command-line arguments schemas
Add a new method in the CommandListener interface to listen to SAX exceptions fired by the command-line configuration parsing
Allow to specify states for command-line arguments
Allow to set the selected tab