[SabreTools, DatFile] Add set flag, add better logging

SabreTools.Helper/README.1ST

@@ -377,7 +377,7 @@ Options:
 			The user-supplied DAT used to check which files need to be rebuilt. Multiple
 			occurrences of this flag are allowed.
 		
-		-out=			Set the name of the output directory
+		-out=				Set the name of the output directory
 			This sets an output folder to be used when the files are created. If a path
 			is not defined, the application directory is used instead.
 			
@@ -386,6 +386,13 @@ Options:
 			(inside the running folder) is not preferred. This is used for any operations that
 			require an archive to be extracted.
 			
+		-set				Enable set-creation mode (lower I/O, slower)
+			Optionally for slower computers, set-creation mode can be enabled. This mode parses
+			through all inputs and creates the logical sets first, reducing the amount of I/O
+			that is required to rebuild all sets by opening each output folder or archive only
+			once. This is much slower than the standard mode, however, because of the preprocessing
+			that it requires.
+			
 		-d, --delete		Enable deletion of the input files [DO NOT USE]
 			Optionally, the input files, once processed, can be deleted. This can be useful
 			when the original file structure is no longer needed or if there is limited space