Update ganalytics.php

Add option to enable Google Universal Analytics Code
Update header.tpl

implement google universal analytics code
Update header.tpl
Update header.tpl

change page track
Update header.tpl

error correction
Update header.tpl

error correction
Merge branch 'patch-1' of https://github.com/luigimassa/PrestaShop-modules into luigimassa-patch-1
Google Analytics : Version changed (v1.4.4)