Add random scroll function to example.
Fix range check for scroll to position.
Position scroll to position item at top of screen.
Fix overscroll.
Remove now uneeded start adjust for header alignment changes.
Merge scroll to position support.
Fix borderline calculation on layout with pre-existing view hierarchy.
Slight tidy and add comments.
Merge fix for loss of position on data changes.
Fix loss of header settings on example fragment recreation.
Correctly set header item selected in menu creation.
Merge example app fixes.
Set width to wrap_content for overlay headers when section margins are fixed.
Fix display of right aligned overlay header.
Smooth scroll.
Fix too many children on scroll up.
Strip logging.
Fix erroneous handling of zero distance to header in smooth scroll.
Remove fixed point on example scroll.
Merge smooth scroll.