TODO: (+ means finished)

BUDDYCAST:
    + Put additional secure connection to Cr or Cu
	+ Moving the raw_server calls back in SecureOverlay
    + Buddycast message length limit	(max. 10 KB for a full buddycast message)
    + Removed 'age' item from buddycast for peers of new version
    Using buddycast2 network to send dialback message
    	+ Simple torrent collecting policy
    	
    
	Update item relevance
    New similarity func between users

    Unit Test
	Log and Log in GUI
	Setup superpeers
	
	Fast torrent collecting from connected peers
    
    Improve recommendation function
    Sign buddycast2 messages
    Reduce bandwidth usage
    
MEGE CACHE:
	Add a peer given only ip and port.

	Change the absolute path of torrents to relative one
	Allow user to select the place to save torrents through torrent collecting
	Remove owners.bsd
	
	Reduce or postpone reading db at start time. Improve performance.

GUI:
	+ Remove meanless part at status bar
	
	Click a torrent and recommend similar torrent

	Dutch version
	Chinese version
    Visualize buddycast2 networks	
    
BUGFIX:    
	+ Don't always keep connection with superpeers (duplicated index in conn list)
    + Remove 'looking for new recommendation' in status bar
    Change firewall status when recv incoming connections