Triggers `__statusBarNeedsAppearanceUpdate` on completion of transition to new content view controller.
Fixes issue #124
Merge pull request #134 from Papercloud/fix/issue_124

Fixes status bar style update.
Fix bug

in the method setContentViewController:animated:, if the
contentViewController == _contentViewController, then
[self.contentViewContainer addSubview:contentViewController.view]; will
cause a crash
Merge pull request #136 from itouch2/master

Fix bug
Version bump (4.0.5)
fixing typo in the doc

The correct identifier should be "contentViewController".
Merge pull request #154 from valanz/patch-1

fixing typo in the doc