added Windows SDK in form of dlls

windows/ZeroTierOneSDK/dllmain.cpp

@@ -0,0 +1,22 @@
+// dllmain.cpp : Defines the entry point for the DLL application.
+#define WIN32_LEAN_AND_MEAN             // Exclude rarely-used stuff from Windows headers
+// Windows Header Files:
+#include <windows.h>
+#include "targetver.h"
+
+BOOL APIENTRY DllMain( HMODULE hModule,
+                       DWORD  ul_reason_for_call,
+                       LPVOID lpReserved
+					 )
+{
+	switch (ul_reason_for_call)
+	{
+	case DLL_PROCESS_ATTACH:
+	case DLL_THREAD_ATTACH:
+	case DLL_THREAD_DETACH:
+	case DLL_PROCESS_DETACH:
+		break;
+	}
+	return TRUE;
+}
+