Better bounce effect.
Merge pull request #16 from bgfriend0/master

Allow single tap exit & double tap zoom to coexist
Hide accessory views when view is zoomed.
Restructure accessory view.
Cleaning
Show accessory view once focus animation is done.
Supporting UIViewContentModeScaleAspectFill #17
AspectFill video sample.
AspectFill video sample.
Updated doc.
Fixed wrong animation when supportedInterfaceOrientations is not UIInterfaceOrientationMaskAll.
Refactoring.
ASMediaFocusManager: Modify to display delete button