Added Movie2kTo and XvidstageCom plugin (now for Stable …)

Here are the two plugins I mentioned (http://forum.pyload.org/viewtopic.php?f=11&t=2078).

They add support for the crypter http://www.movie2k.to and for the hoster http://xvidstage.com

There is a little problem with Movie2kTo if it only returns one link …