Segment support

Hi,

I've looked at

/*
 * Request report data.
 * @param $request['#dimensions']  required
 * @param $request['#metrics']     required
 * @param $request['#sort_metric'] optional [default=none]
 * @param $request['#filter']      optional [default=none]
 * @param $request['#start_date']  optional [default=GA release date]
 * @param $request['#end_date']    optional [default=today]
 * @param $request['#start_index'] optional [default=1]
 * @param $request['#max_results'] optional [default=10,000]
 */
google_analytics_api_report_data($request)

There is no segment in that list, segment is important if you want to filter out your traffic source such as paid, non-paid, direct, referred traffic.

I will take a crack at it and post an updated version later.