gitignoreをアップデート．
First commit.
Added the base view to popover.
Refactoring the invariables for view size.
Automatically adjust height of popover when popover is presented at the upper region.
Automatically adjust baloon’s origin point.
Remove all child view controllers when the UZMultipleLayeredPopoverController’s parent view controller is tapped.
Refactoring the code to calculate the frame of popover.
Adjust the popover frame according to the specified popover’s direction.
But, still UZMultipleLayeredPopoverAnyDirection does not work properly.
Refactoring the code to calculate the frame of popover.
Added the code to decide the direction  of the popover automatically.
Refactoring.
Refactoring the code to calculate area of popover.
Enabled dispose popovers when tapped the inactive popover.
Refactoring UZMultipleLayeredPopoverTouchDummyView class.
Refactoring the code to dispose all popovers when tapped in the area without popovers.
Changed a sample application.
Added the code to dismiss popovers manually.
Added the code to raise exception when the illegal view controllers are set to the popover.
Changed the code to dismiss popovers.
Refactoring and removed UZMultipleLayeredPopoverTouchDummyView class.
Hide UZMultipleLayeredPopoverController class’s interface.
Refactoring sample codes.