Updated code documenation

googleanalytics.module

 <?php
 
-/*
+/**
  * @file
- * Drupal Module: GoogleAnalytics
- * Adds the required Javascript to the bottom of all your Drupal pages
- * to allow tracking by the Google Analytics statistics package.
+ * Drupal Module: Google Analytics
+ *
+ * Adds the required Javascript to all your Drupal pages to allow tracking by
+ * the Google Analytics statistics package.
  *
  * @author: Alexander Hass <http://drupal.org/user/85918>
  */
 
+/**
+ * Define the default file extension list that should be tracked as download.
+ */
 define('GOOGLEANALYTICS_TRACKFILES_EXTENSIONS', '7z|aac|arc|arj|asf|asx|avi|bin|csv|doc|exe|flv|gif|gz|gzip|hqx|jar|jpe?g|js|mp(2|3|4|e?g)|mov(ie)?|msi|msp|pdf|phps|png|ppt|qtm?|ra(m|r)?|sea|sit|tar|tgz|torrent|txt|wav|wma|wmv|wpd|xls|xml|z|zip');
 
-// Remove tracking from all administrative pages, see http://drupal.org/node/34970.
+/**
+ * Define default path exclusion list to remove tracking from admin pages,
+ * see http://drupal.org/node/34970 for more information.
+ */
 define('GOOGLEANALYTICS_PAGES', "admin\nadmin/*\nbatch\nnode/add*\nnode/*/*\nuser/*/*");
 
 /**