Add missing thickbox file into soc/content/images and fix the url to this file in jquery-thickbox.css.
Patch by: Pawel Solyga
Reviewed by: to-be-reviewed
# Directions for web crawlers.
# See http://www.robotstxt.org/wc/norobots.html.
User-agent: HTTrack
User-agent: puf
User-agent: MSIECrawler
User-agent: Nutch
Disallow: /