Reduce microblog polling time

src/freedombone

 		echo "\$config['site']['qvitter']['enabledbydefault'] = true;" >> $microblog_config_file
 		echo "\$config['site']['qvitter']['defaultbackgroundcolor'] = '#f4f4f4';" >> $microblog_config_file
 		echo "\$config['site']['qvitter']['defaultlinkcolor'] = '#0084B4';" >> $microblog_config_file
-		echo "\$config['site']['qvitter']['timebetweenpolling'] = 120000; // two minutes" >> $microblog_config_file
+		echo "\$config['site']['qvitter']['timebetweenpolling'] = 30000; // 30 secs" >> $microblog_config_file
 		echo "\$config['site']['qvitter']['urlshortenerapiurl'] = 'http://qttr.at/shortener.php';" >> $microblog_config_file
 		echo "\$config['site']['qvitter']['urlshortenersignature'] = 'b6afeec983';" >> $microblog_config_file
 		if [ $MICROBLOG_BACKGROUND_IMAGE_URL ]; then