Hmmm. Never hooked this Bgr method up.
Add the wait with click to cancel versions of object mutators.
Fix "chapter" titles in Clannad.

- objPlay had never been implemented. (It looks equivalent to ganPlay.)
- The implementation of isGanDonePlaying was backwards. This has been fixed.
- The highest risk part of this patch is GraphicsObjectOfFile::srcRect().
  Without this change, as soon as the animation is done, the title disappears.
Also add an object animation wait command.