* Iframe busting ALL pages except widgets/dashboard
 * Refactored iframe busting code
 * This new behavior might break some backward compatibility but can be disabled by setting enable_framed_pages = 1 in the config file

@vipsoft your review is welcome on this one!

git-svn-id: http://dev.piwik.org/svn/trunk@5805 59fd770c-687e-43c8-a1e3-f5a4ff64c105