Changed the context for card link bindings

This was done to support card links in the lightbox (i.e., for
screenshots)
Revised screenshot implementation

Added tracking events and removed external function from FFVIII and
FFXIII-2 screenshots
Added "simple" parameter to encounter rendering

This uses normal characters rather than HTML entities, allowing use in
title attributes
Extended card local caching to 60 minutes
Added screenshots for FF1

They are available for treasures and set encounters.  In either case,
the screenshot shows all treasures and set encounters on the screen, and
outlines the one that was actually clicked