BIG TCP Overhaul and passcode start

- Switch to Serilog for console logging
- TCPSender is now persistent (let's hope) so can be used with passcode protected workspaces
- UDP connection works with passcodes just can't timeout
- Passcode prompt is automatic for workspaces that are password protected

iOS/Main.cs

@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-
-using Foundation;
-using UIKit;
+using UIKit;
 
 namespace qController.iOS
 {