v0.5.0

So fixed major stuffs mostly like :

• playlist not created error
• fixed format in web mode as it downloaded in mp3
• fixed another download bug as it downloaded in mp4 , when set to default
• fixed loop during playback which caused one command execution only and other were not listened

And added some more thing:

• a export feature
• added better port handling
• added –port ( ~5 commands ) and –version commands