Mac OSX support

[tapio]

Support OSX and build a bundle.

Mac issues from early 2011 below. Should first check with latest version of Qt and Phonon.

• Phonon cannot decode Ogg (ffmpeg can), wav works fine
  • http://www.xiph.org/quicktime/ (Phonon should use QuickTime as a backend)
• Pitchvis causes infinite recursion move->setGeometry->move->... (and a few functions in between)
• Also infinite recursion finalizeNewLyrics -> QWidget::setFixedWidth -> QWidget::resize -> QWidget::setGeometry -> QApplication::notify -> QScrollArea::updateScrollBars -> QWidget::resize -> QApplication::notify -> QWidget::resize -> QApplication::notify ...