Last Latin Extended-B fixes!

1. Smoothened out the hook on uppercase C with hook.

2. Thinned and curled tail on ezh with hook.

3. Remodelled tails of uni0224 and uni0225 on those of capital and
lowercase Yogh (proviously they were modelled on the cedilla).

Adjusted bearings where necessary.
Upside-down a

Remodeled upper serif on that of "u". Adjusted outline to be more
pleasing (especially w.r.t. the widths of the narrow portions).

Also, added anchor points (these are essential for all IPA characters!)
Up to uni0255

Added anchor points to script a, adjusted right bearing.

Adjusted turned script a, remodelling the bowl on those of thorn and b,
and the serifs on those of p and b. Added anchor points.

Adjusted bearings of implosive b, added anchor points.

Deleted superfluous anchor points on open o, remodelled the upper serif
on that of reversed-s, and increased left bearing.

Adjusted thickness of tail on c-with-tail, changed bearings, added
anchor points.