TODO:
/**
* Outputs the Googlg Analitics script TAG. This binder also verifies the referral IP
* address against a black list og analytics spammers.
*
* @param {string} $ua Google Analytics account number
* @param {string} $exclude IPs to exclude separated by comma
*
* @example
*
* {{ga ua="UA-61505055-1"}}
*
*/