Added subscription service capability.

TCPServer.h

@@ -6,6 +6,7 @@
 #include "IPAddressList.h"
 #include "Command.h"
 #include "CommandList.h"
+#include "SubscriptionManager.h"
 
 namespace core {
 
@@ -40,7 +41,7 @@ namespace core {
       /// The destructor for this object.
       ///
 
-      ~TCPServer();
+      virtual ~TCPServer();
 
       virtual void sessionErrorHandler(std::string errorString, std::stringstream &out);
 
@@ -135,6 +136,7 @@ namespace core {
 
       TCPSession * accept();
       std::mutex lock;
+      SubscriptionManager subscriptions;
 
    };