public static function factory($config = array()) {
        $defaults = array(
            'base_url' => self::API_URL,
            'version' => 'v2.1',
            'command.params' => array(
                'command.on_complete' => function($command) {
                    $response = $command->getResult();

                    // We don't need the meta blocks
                    unset($response['meta']);

                    // If we're down to a single element (events, talks etc)
                    // return only this element
                    if (count($response) == 1) {
                        $command->setResult(reset($response));
                    }
                }
            )
        );

        $required = array(
            'base_url',
            'version',
        );

        $config = Collection::fromConfig($config, $defaults, $required);

        $client = new self($config->get('base_url'), $config);

        // Attach a service description to the client
        $description = ServiceDescription::factory(__DIR__ . '/client.json');
        $client->setDescription($description);

        return $client;
    }