5087 capture current theme, then reset it back into the session after leaving the page
5013 added IE6 detection, and a redirect to a static sorry page
Merge branch 'master' of https://github.com/atutor/ATutor
5187: Use complete URLs for theme image paths to bypass the base href.
5091 adjusted related word output, and uncommented related code in template
Merge branch 'master' of github.com:atutor/ATutor
Merge branch 'umaster' into changedAT