unittest on appveyor

ixwebsocket/windows/IXSetThreadName_windows.cpp

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+/*
+ *  IXSetThreadName_windows.cpp
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
+ */
+#include "../IXSetThreadName.h"
+#include <iostream>
+
+namespace ix
+{
+    void setThreadName(const std::string& name)
+    {
+        // FIXME
+        std::cerr << "setThreadName not implemented on Windows yet" << std::endl;
+    }
+}