fixed MonoTorrent namespace

src/MonoTorrent/BEncoding/BEncodedString.cs

@@ -1,8 +1,5 @@
 using System;
-using System.IO;
-using System.Collections;
 using System.Text;
-using MonoTorrent.Common;
 using MonoTorrent.Messages;
 
 namespace MonoTorrent.BEncoding

src/MonoTorrent/InfoHash.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
-using MonoTorrent.Common;
-using System.Web;
 
 namespace MonoTorrent
 {

src/MonoTorrent/ToolBox.cs

@@ -1,10 +1,8 @@
 using System;
-using System.Collections;
-using System.Text;
 using System.Collections.Generic;
 using System.Threading;
 
-namespace MonoTorrent.Common
+namespace MonoTorrent
 {
 	public delegate long Operation<T>(T target);
 

src/MonoTorrent/Torrent.cs

@@ -5,7 +5,6 @@ using System.Net;
 using System.Security.Cryptography;
 using System.Text;
 using MonoTorrent.BEncoding;
-using MonoTorrent.Common;
 
 namespace MonoTorrent
 {