Fix a few issues that appeared during refactoring.

PixelHub-Server/PixelHub/PixelBot.cs

@@ -29,7 +29,7 @@ namespace PixelHub.Server
 		/// Starts listening for and handling messages that come from the remote PixelBot.
 		/// </summary>
 		/// <param name="client">Client.</param>
-		public async Task Handle(TcpClient client)
+		public async Task Handle()
 		{
 			if (Connected)
 				throw new InvalidOperationException("Only one connection handling loop can be active at once!");

PixelHub-Server/PixelHub/PixelCommand.cs

@@ -13,7 +13,7 @@ namespace PixelHub
 	/// <summary>
 	/// Specifies a single command that is to be sent to a PixelBot.
 	/// </summary>
-	class PixelCommand
+	public class PixelCommand
 	{
 		/// <summary>
 		/// The wheel(s) that should be operated upon.