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/ProgressCallback.h

@@ -0,0 +1,40 @@
+#pragma once
+
+
+#include "SevenZipLibrary.h"
+#include "CompressionFormat.h"
+
+
+namespace SevenZip
+{
+	class ProgressCallback
+	{
+	public:
+
+		/*
+		Called at beginning
+		*/
+		virtual void OnStartWithTotal(const TString& archivePath, unsigned __int64 totalBytes) = 0;
+
+		/*
+		Called Whenever progress has updated with a bytes complete
+		*/
+		virtual void OnProgress(const TString& archivePath, unsigned __int64 bytesCompleted) = 0;
+
+
+		/*
+		Called When progress has reached 100%
+		*/
+		virtual void OnDone(const TString& archivePath) = 0;
+
+		/*
+		Called When single file progress has reached 100%, returns the filepath that completed
+		*/
+		virtual void OnFileDone(const TString& archivePath, const TString& filePath, unsigned __int64 bytesCompleted) = 0;
+
+		/*
+		Called to determine if it's time to abort the zip operation. Return true to abort the current operation.
+		*/
+		virtual bool OnCheckBreak() = 0;
+	};
+}