I have just built a new website and would like to use Google Analytics.  The Gantry template has a field for UA code but Analytics only gives a G code nowadays which doesn't work. (I entered the G code in the UA code field and waited a couple of days but no data was transferred).  It looks like the alternative is to add a code snippet to each page but I can't see how to do that and I am a reluctant to try since I don't know what I am doing.  Has anyone else had the same problem and could perhaps point me in the right direction?