Replace browscap with Regex based UA parser

[admin]

We need to replace the use of Browscap file for determining the browser and version opting instead to use a proper UA parser.

[admin]

possible parser lib: http://chrisschuld.com/projects/browser-php-detecting-a-users-browser-from-php/

[admin]

Also we should use the UserAgentString?.com web service (http://www.useragentstring.com/pages/api.php) as a backup. if we filter this in the UA event handler we will avoid the latency hit when running owe in async mode.