updates CDN, removes minimum version requirement

This updates the Google CDN for jQuery and removes the version requirement (since we intend to use basic jQuery selection tools to analyze the URL for Google Mail thread ID).

This commit produces an error:

Blocked loading mixed active content "http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"

when executed in Firebug's Console.  Most probably because I have no idea what I'm doing as yet.