[Plugin: NextGEN Gallery] Shutter arrow key navigation

For anyone interested in key navigation/browsing for the shutter script, i tweaked the script to support left/right and escape keys.

https://www.flyvans.com/wordpress/wp-content/plugins/nextgen-gallery/shutter/shutter-reloaded.js

when displaying a pictureset, it makes browsing much more convenient.

rgds,
bernie