this script is inspired by http://d.hatena.ne.jp/lolloo-htn/20090417/1239972394. usage: nico-downloader.py --user=USERNAME --passwd=PASSWD mylist_url
this script is inspired by http://d.hatena.ne.jp/lolloo-htn/20090417/1239972394. usage: nico-downloader.py --user=USERNAME --passwd=PASSWD mylist_url