Secure Transacted File System (STFS) Support (#78)

* Initial STFS support

* Fix build errors

* Fix more build errors

* Final fix

* Cleanup printer

* Fix indent

SabreTools.Data.Models/STFS/HashTable.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace SabreTools.Data.Models.STFS
+{
+    /// <summary>
+    /// STFS Hash Table in a Hash Table Block 
+    /// </summary>
+    /// <see href="https://free60.org/System-Software/Formats/STFS/"/>
+    public class HashTable
+    {
+        /// <summary>
+        /// 170 hash table entries in a single table/block
+        /// </summary>
+        public HashTableEntry[] HashTableEntries { get; set; } = new HashTableEntry[170];
+    }
+}