cleanup Logger/Store classes; move them to new namespaces, fix a path-separator bug

AcceptanceTest/TestBase.cs

@@ -2,6 +2,8 @@
 using QuickFix;
 using System.IO;
 using System.Net;
+using QuickFix.Logger;
+using QuickFix.Store;
 
 namespace AcceptanceTest;
 

Examples/Executor/Program.cs

@@ -4,6 +4,8 @@
 using System.Runtime.ConstrainedExecution;
 using System.Text;
 using QuickFix;
+using QuickFix.Logger;
+using QuickFix.Store;
 
 namespace Executor
 {

Examples/SimpleAcceptor/Program.cs

@@ -3,6 +3,8 @@
 using System.Linq;
 using System.Text;
 using QuickFix;
+using QuickFix.Logger;
+using QuickFix.Store;
 using QuickFix.Transport;
 
 namespace SimpleAcceptor

Examples/TradeClient/Program.cs

@@ -2,6 +2,8 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using QuickFix.Logger;
+using QuickFix.Store;
 
 namespace TradeClient
 {
@@ -31,8 +33,8 @@ static void Main(string[] args)
             {
                 QuickFix.SessionSettings settings = new QuickFix.SessionSettings(file);
                 TradeClientApp application = new TradeClientApp();
-                QuickFix.IMessageStoreFactory storeFactory = new QuickFix.FileStoreFactory(settings);
-                QuickFix.ILogFactory logFactory = new QuickFix.ScreenLogFactory(settings);
+                IMessageStoreFactory storeFactory = new FileStoreFactory(settings);
+                ILogFactory logFactory = new ScreenLogFactory(settings);
                 QuickFix.Transport.SocketInitiator initiator = new QuickFix.Transport.SocketInitiator(application, storeFactory, settings, logFactory);
 
                 // this is a developer-test kludge.  do not emulate.

QuickFIXn/AbstractInitiator.cs

@@ -2,6 +2,8 @@
 using System.Threading;
 using System.Collections.Generic;
 using System;
+using QuickFix.Logger;
+using QuickFix.Store;
 
 namespace QuickFix
 {

QuickFIXn/ClientHandlerThread.cs

@@ -2,6 +2,7 @@
 using System.Net.Sockets;
 using System.Threading;
 using System;
+using QuickFix.Logger;
 
 namespace QuickFix
 {