moved stream into synergy namespace (to prevent naming collision in win libs)

implemented ipc "hello" message (to identify client type)
integ tests working for hello message, but use of ipc in main program has problem with events.

src/lib/synergy/CClientApp.cpp

@@ -528,6 +528,10 @@ CClientApp::mainLoop()
 
 	// create the event queue
 	CEventQueue eventQueue;
+	
+	if (argsBase().m_enableIpc) {
+		initIpcClient();
+	}
 
 	// start client, etc
 	appUtil().startNode();