"Hey, it's the day before my birthday, but I'm releasing a new module" release
Switch default behavior of Text::MeCab when it goes out of scope. See "Text::MeCab AND SCOPE" section in Text::MeCab POD. This all prompted by post at http://d.hatena.ne.jp/t-tkzw/20060710/p1.
Add new Text::MeCab::Node::Cloned to workaround.
Add warning about not using cloned node when Text::MeCab goes out of scope.