Added wacca stub code

mercuryio/config.c

@@ -0,0 +1,25 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "mercuryio/config.h"
+
+/*
+Wacca Default key binding
+*/
+
+void mercury_io_config_load(
+        struct mercury_io_config *cfg,
+        const wchar_t *filename)
+{
+    wchar_t key[16];
+    int i;
+
+    assert(cfg != NULL);
+    assert(filename != NULL);
+
+    cfg->vk_test = GetPrivateProfileIntW(L"io4", L"test", '1', filename);
+    cfg->vk_service = GetPrivateProfileIntW(L"io4", L"service", '2', filename);
+}