remove/update outdated TODO comments
add TODO comment
minor optimization in tag section -> string conversion
cosmetics
add "transform" pseudo-entry in tag list
Makes it possible to easily create a transform using the default ASSTransform signature and ASS.createTag() without having to care about the internal transform type
dynamically generate tag type -> tag name table
also change its name to something more descriptive of the content
change variable names for tag name tables to something more indicative of the content