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/Source/WindowsUtility/Private/WindowsFileUtility.cpp

@@ -0,0 +1,17 @@
+#include "WindowsFileUtilityPrivatePCH.h"
+
+class FWindowsFileUtility : public IWindowsFileUtility
+{
+	/** IModuleInterface implementation */
+	virtual void StartupModule() override
+	{
+
+	}
+
+	virtual void ShutdownModule() override
+	{
+
+	}
+};
+
+IMPLEMENT_MODULE(IWindowsFileUtility, WindowsFileUtility)