[DATFromDir, RomManipulation, Stats] Various changes, see below

There are at least 2 separate changes that got intermingled on this one so I'm committing them all at the same time.
The first is massive overhauls to the Romba portion of DATFromDir. This part is still a work in progress.
The second is adding more items to the DatData struct to allow for better and more efficient stat collection.

SabreHelper/Data/Structs.cs

@@ -61,5 +61,14 @@ namespace SabreTools.Helper
 		public bool GameName;
 		public bool Romba;
 		public bool TSV; // tab-deliminated output
+
+		// Statistical data related to the DAT
+		public long RomCount;
+		public long DiskCount;
+		public long TotalSize;
+		public long CRCCount;
+		public long MD5Count;
+		public long SHA1Count;
+		public long NodumpCount;
 	}
 }