Bugfixes for pages from custom xib

1) By setting the newPage as owner when loading the xib, its possible to create custom subclasses for pages and connect IBOutlets by setting the 'File Owner's class in the xib to the custom subclass

2) By setting the frame of the customView to pageView.bounds, the height of the customView will be set correctly. With this, its possible to use autoresizeMask or Autolayout in the xib to build interfaces for both, 3.5'' and 4'' iPhones