Mk2Rev1

various bugfixes and such.
also bookmarks, temp song loaderm and undo overhaul with near complete multiplayer, but menu items disabled. i really wish i could split this into multiple commits, but i don't know how to work unreal.

Plugins/ZipUtility-ue4/ThirdParty/7zpp/Include/SevenString.h

@@ -0,0 +1,15 @@
+#pragma once
+
+
+#include <tchar.h>
+#include <string>
+
+
+namespace SevenZip
+{
+#ifdef _UNICODE
+	typedef std::wstring TString;
+#else
+	typedef std::string TString;
+#endif
+}