Updated version to 8.1.

CommonAssemblyInfo.cs.in

@@ -29,7 +29,7 @@ using System.Reflection;
 [assembly: AssemblyCopyright("Copyright (C) 2002-2015 Jeroen Frijters")]
 [assembly: AssemblyTrademark("")]
 [assembly: AssemblyCulture("")]
-[assembly: AssemblyVersion("8.0.@BUILD@.0")]
+[assembly: AssemblyVersion("8.1.@BUILD@.0")]
 
 #if SIGNCODE
 	#pragma warning disable 1699