Feature: The KVO is available for selectedIndex and selectedViewController properties.
Feature: AXStretchableSubViewControllerViewSource protocol is available to set scroll view.
Feature: No swipable header is default. Look at "No horizontal swipe header" example.
Feature: Support "self" in interactive header view.
Feature: Reveal delegate in tab view controller.
Feature: add bottom separator.
Fix: Detect hit event in children/grandchildren of header view subviews.
Fix: View controller transition fault
Feature: No header view style.
Fix little bug in Example Files.
Initial release.