Add AutomationCommands class

- AutomationCommands replaces GetAllMenuCommands, and can provide
information about menus, buttons and toolbars to a script.
- BatchCommands can now return textual results to a script.
- There's a new GUID for mod-script-pipe and it is included in the .sln.

lib-src/mod-script-pipe/mod-script-pipe.vcxproj

@@ -11,7 +11,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <PropertyGroup Label="Globals">
-    <ProjectGuid>{73BF0B4D-6EC3-49ED-87AE-E629F1CA2737}</ProjectGuid>
+    <ProjectGuid>{85774A29-EA2F-4A40-994F-6BE593D847A5}</ProjectGuid>
     <RootNamespace>modscriptpipe</RootNamespace>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />