#2 Allow use in XML file extended class

[Rafael Heise]

Today I can use Button class from AWT in my XML file.
But I want use MyButton class, and I cant, because
thinlet does not allow.

Maybe could interesting have a plus XML file that
indicate what class I want use to Button or Panel...
Maybe you can use RTTI information and ClassLoader to
do it.

This way, anyone can use anyclass... And Swing too,
and do not necessary re-coding thinlet class!! Just
define XML file and everthing is right!!

Maybe I can help your project to do it, but I don't
know!