Add multi-inline extension script to tutorial

It's useful to have an example of an extension script that handles
multiple types of things.  It's also good to show that scripts can
handle data types other than strings, and can chase an address to
format data items elsewhere in the code.

This required updating the tutorial binary, adding the new script,
and updating the tutorial text and associated screen shots.

SourceGen/Examples/Tutorial/InlineNullTermString.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-
 using PluginCommon;
 
 namespace ExtensionScriptSample {
@@ -41,6 +40,7 @@ namespace ExtensionScriptSample {
         public void UpdateSymbolList(List<PlSymbol> plSyms) {
             mNullStringAddrs.Clear();
 
+            // Find matching symbols.
             foreach (PlSymbol sym in plSyms) {
                 if (sym.Label.StartsWith(LABEL_PREFIX)) {
                     mNullStringAddrs.Add(sym.Value, sym);
@@ -61,7 +61,7 @@ namespace ExtensionScriptSample {
             // search for the terminating null byte
             int nullOff = offset + 3;
             while (nullOff < mFileData.Length) {
-                if (mFileData[nullOff] == 0) {
+                if (mFileData[nullOff] == 0x00) {
                     break;
                 }
                 nullOff++;