MonoTorrent error messages
I updated to https://github.com/MultiPoolMiner/MultiPoolMiner/commit/2e3aeea554ca259bba7730338a6ceb08afb52b3a

Now I get the following compiler errors on startup:

```
WARNING: [MPM-Dir]\MonoTorrent\MonoTorrent.Client\Tasks\DelegateTask.cs(10,33): warning CS0649: Field 'DelegateTask.Handle' is never assigned to, and will always have its default value null
        public ManualResetEvent Handle;
                                ^

WARNING: [MPM-Dir]\MonoTorrent\MonoTorrent.Client\Managers\TorrentManager.cs(84,22): warning CS0414: The field 'TorrentManager.disposed' is assigned but its value is never used
        private bool disposed;
                     ^

WARNING: [MPM-Dir]\MonoTorrent\MonoTorrent.Client\Managers\TrackerManager.cs(70,22): warning CS0414: The field 'TrackerManager._disposing' is assigned but its value is never used
        private bool _disposing = false;
                     ^
```