[Initials] add B

[lutetiensis]

Cf. #115.

Let me know what you think,

[georgd]

As with C in https://github.com/georgd/EB-Garamond/pull/117 would you mind reducing the line width of the ornament at the right of the top bowl and refine the ornaments at the left of the stem and inside the bowls?

And while I appreciate the take on the symmetry, the ornament leafs peaking from behind the top bowl on the inside make the letterform appear fuzzy. I think, that should be hidden completely behind the letter.