Bug fix.

Not calling manager.Monitor.Reset() will cause a stuck download/upload speed property in torrent managers.
Better media poster download handling.
Get rid of forced bindings updates.
Update TorrentCount property only when necessary.

Also remove some old unused piece of code.
Merge remote-tracking branch 'remotes/hexf/master'
Implement binding to a specific network interface.
Comment out the interface property in the settings.
Merge pull request #42 from diantahoc/master

Implement network interface selection & performance improvements.