Update README for IS-Z

Author: mnadareski

README.md

@@ -111,6 +111,7 @@ Below is a list of archive or archive-like formats that can be extracted and hav
 - BFPK
 - BZIP2
 - GZIP
+- InstallShield Archive V3 (Z)
 - InstallShield CAB
 - Microsoft CAB
 - MPQ

Test/Program.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using BurnOutSharp;