Browser.php updated to v1.5

In the Browser.php project John pointed out (in the comments) a terrible typo in the source. I imagine no one has encountered this before as it only effects v1 or v1.5 of Internet Explorer.

Typo updated and version 1.5 of Browser.php released: http://chrisschuld.com/projects/browser-php-detecting-a-users-browser-from-php/