The rest of Latin-Extended B

Sorry for the delay. I know I'm way out of sync.

These commits include my version of the open O (which should be replaced by yours), a few tweakings of letterforms for better consistency (e.g. turning the ball terminal of script V into a small serif), and adjustments of bearings for slashed/hooked letters.

I think that this wraps up my modifications of Latin-Extended B. Now, on to IPA!