Added space below image content.
Edited way image description/space is dismissed if description / image is not present
Next Story constraints updated to fix image from getting chopped off.
Removed DDPopoverBackgroundView and replaced with MITPopoverBackgoroundView
Upgraded popover clarity.
Added tint color for popover.
removed unnecessary header comments
Added default arrow color/alpha
Added popover image.
Changed some hardcoded variables to image constants.
Fixed redrawing of popover when device rotated.
Renamed variables.  Copied changes from UP arrow to Left, Right, and Down
Added Corner case image.
Moved some UIImageViews out of header.
Added Top Left Corner Case.
Added support for Top Right Arrow
Bottom Arrow Edge Cases added.
Left and right arrows edge cases.
left and right bottom popover box position fix
arrow updates
bubble height fix
removed nslog
Changed variable names.
Reworked arrow and bubble drawing to produce sharper popovers.
Merge branch 'refs/heads/3.6/ipad-news-story-detail-changes' into 3.6/ipad-news-test-merge