Using html5slider
Fix issue with imagediff & slider
Updated frames with text and added a thanks to the readme.
make mousewheel work.
Minor CSS change.
Add button to skip to last seen frame

Store the last seen frame in a cookie, and add a button to easily jump
to that frame when revisiting the site.
Only display lastSeen button when data available

Avoid confusing people who don't have a cookie set with a button which
won't do anything.  Hide the lastSeen button and only display it if a
last seen frame is known.
Fixed bug in bitly.php file that allowed for numbers that were not integers.