refresh the engine translation (no manual edit, though)
update the version number
cosmetics in the presentation of catched exceptions while running user code
add jython after scala in the jarfile so that jython's META-INF/services/javax.script.ScriptEngineFactory gets selected over scala's one

we compile scala anyway. But this will lead to some problems in the
future when we want to add an second interpreted language to the
jarfile...