Update Google Analytics code
Update Google Analytics code

Use latest tracking blurb straight from Google. Also, the new code
uses "auto" for the domain so we don't need to set that anymore.

Signed-off-by: Alan Orth <c25dd0841d5fa94899de8e3e4e0aaeefb868a1ba@gmail.com>

alanorth/pelican-alchemy,mathn/pelican-alchemy,jeanpetric/pelican-alchemy,nairobilug/pelican-alchemy,nairobilug/pelican-alchemy