fixed content view height calculation
Add storyboard support, redraw badge after changing its value.
Set tabBarController as associated object to UIViewControllers.
Remove unused imports from demo project, set version to 1.1.4.
Merge pull request #15 from grandcentrix/contentview_height_fix

fixed content view height calculation
Move loadView code to viewDidLoad, use tabBarHeight if minimumContentHeight is not set.