[DatTools] Add reverse cascade

Add reverse cascaded diffing. Essentially this just reverses the list of input files so that the last file is treated as the first and so on. Has not been tested.

SabreTools/SabreTools.cs

@@ -81,7 +81,6 @@ namespace SabreTools
 				add = false,
 				archivesAsFiles = false,
 				bare = false,
-				cascade = false,
 				clean = false,
 				datfromdir = false,
 				datprefix = false,
@@ -122,7 +121,8 @@ namespace SabreTools
 				skip = false,
 				update = false,
 				usegame = true;
-			bool? nodump = null;
+			bool? cascade = null,
+				nodump = null;
 			long sgt = -1,
 				slt = -1,
 				seq = -1;
@@ -335,6 +335,10 @@ namespace SabreTools
 					case "--roms":
 						usegame = false;
 						break;
+					case "-rc":
+					case "--rev-cascade":
+						cascade = false;
+						break;
 					case "-rm":
 					case "--remove":
 						rem = true;