- Modified DNAClassAttribute to also support usage on structs

- Added auto generation of DNAClass attributes on file generation
- Regenerated all files

BlendFile/DNA/SpreadsheetColumnID.cs

@@ -13,6 +13,7 @@ using System;
 namespace BlendFile.DNA {
     using BlendFile;
     
+    [DNAClassAttribute(965, "SpreadsheetColumnID")]
     public class SpreadsheetColumnID {
         [DNAFieldAttribute(0, "char", "*name", 1)]
         public char ptr_name;