…ction to allow negative offsets and position's custom offset notation. See http://api.jqueryui.com/position/
Calling utility functions flip.top() and flip.left() no longer set position values by reference. The 'using' callback function passes an additional data parameter. Detect when 1.9 or a lower version is detected and apply collision detection appropriately.
The previous implementation made it impractical to do .live/.delegate style binding to elements in the popover, as the events would be swallowed by the popover close handler.
…eeded, toggle popover for current trigger
…default only show one popover on the screen at once
… method names.