Bug fixes in placement of popover and iOS 6 compatibility.
Merge branch 'master' of git://github.com/werner77/WEPopover

Conflicts:
	Classes/Popover/UIBarButtonItem+WEPopover.h
	Classes/Popover/UIBarButtonItem+WEPopover.m
	Classes/Popover/WEPopoverContainerView.h
	Classes/Popover/WEPopoverContainerView.m
	Classes/Popover/WEPopoverController.h
	Classes/Popover/WEPopoverController.m