message: Add TODO for hmtx usage
diff: @@ -160,7 +160,7 @@ FontTable (tag : Tag) = match tag.value {
  "cmap" => CharMap, // Character to glyph mapping
  "head" => FontHeader, // Font header
  "hhea" => HorizontalHeader, // Horizontal header
  - "hmtx" => Unknown, // Horizontal metrics
  + "hmtx" => Unknown, // Horizontal metrics // TODO: Depends on "hhea"
  "maxp" => MaximumProfile, // Maximum profile
  "name" => Unknown, // Naming table
  "OS/2" => Os2, // OS/2 and Windows specific metrics
  