[20080327]
GUI Improved: new option in advanced connection settings ofpreferences dialog: Enable Anti-Leech
GUI Improved: FireFox extension add download video files command to context menu of web page
Core Improved: after enable Anti-Leech, connections which transfer little data during a long time will be disconnected
Core Improved: enhance video file preview, support avi, rmvb, wmv, mpg, flv, ogm, mkv, mp4 files