Add more complete implementation for custom new/delete, add panic

src/nostalgia/core/mem.hpp

@@ -0,0 +1,15 @@
+/*
+ * Copyright 2016-2017 gtalent2@gmail.com
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+namespace nostalgia {
+namespace core {
+
+void initHeap();
+
+}
+}