- Visitors online now treats different browsers/platforms from the same IP address as different users (this helps with multiple users behind proxy servers).
- Minor code cleanup to use class variables instead of reparsing the browser agent string.

git-svn-id: https://plugins.svn.wordpress.org/wp-statistics/trunk@982226 b8457f37-d9ea-0310-8a92-e5e31aec5664