ChromeShack.processFullPosts fix & "elder scroll" script update

The more important changes are:

1. ChromeShack.processFullPosts had an XPath expression that evaluated against the entire page even though the intended behavior seemed to be to evaluate on a node passed by argument.  The function has been changed to use the 'element' parameter.

2. The elder scroll script no longer loads in dupe threads. It also no longer hangs the browser for a really long time because of the first change.