us to use QScriptEngines from other sources (such as QML) we need
to change the code so that we don't have a custom QScriptEngine
subclass - only one codebase can do that at a time. The scriptenv
is now a normal QObject and contains a QScriptEngine instead of
inheriting from it.
svn path=/trunk/KDE/kdebase/runtime/; revision=1094259