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/Public/IWindowsFileUtility.h

@@ -0,0 +1,36 @@
+
+#pragma once
+
+#include "ModuleManager.h"
+
+
+/**
+* The public interface to this module.  In most cases, this interface is only public to sibling modules
+* within this plugin.
+*/
+class IWindowsFileUtility : public IModuleInterface
+{
+
+public:
+
+	/**
+	* Singleton-like access to this module's interface.  This is just for convenience!
+	* Beware of calling this during the shutdown phase, though.  Your module might have been unloaded already.
+	*
+	* @return Returns singleton instance, loading the module on demand if needed
+	*/
+	static inline IWindowsFileUtility& Get()
+	{
+		return FModuleManager::LoadModuleChecked< IWindowsFileUtility >("WindowsFileUtility");
+	}
+
+	/**
+	* Checks to see if this module is loaded and ready.  It is only valid to call Get() if IsAvailable() returns true.
+	*
+	* @return True if the module is loaded and ready to use
+	*/
+	static inline bool IsAvailable()
+	{
+		return FModuleManager::Get().IsModuleLoaded("WindowsFileUtility");
+	}
+};