This is cool, Ned,

  I knew I had to write the compatibility with/transition from the old
version.  This helps a lot.

  I didn't know #classVersion mechanism, hehe.

  One thing I noticed is TTCFont>>emphasis doesn't check the
NamesToIndexes dictionary.

  Now I'm wondering that the way we use to avoid the text style name
conflict makes sense or not...  We want to assign the same name for a
font across the images so that project exporting/loading can be done
without confusion.  Maybe we should always put 'TT' (or '-TT' for
readability) for TrueType fonts.

  How do you think?

-- Yoshiki