unittest on appveyor

test/test_runner.cpp

@@ -7,8 +7,14 @@
 #define CATCH_CONFIG_RUNNER
 #include "catch.hpp"
 
+#include <ixwebsocket/IXSocket.h>
+
 int main(int argc, char* argv[]) 
 {
+    ix::Socket::init(); // for Windows
+
     int result = Catch::Session().run(argc, argv);
+
+    ix::Socket::cleanup(); // for Windows
     return result;
 }