Prepare glyph shapes for mf2pt1 conversion.

Prepare glyph shapes for mf2pt1 conversion.

* mf/feta-macros.mf, mf_feta-eindelijk.mf: Some formatting.

* mf/feta-toevallig.mf: Formatting.
(draw_meta_sharp): Modify path to replace `filldraw' with `fill'.
("Natural"): Fix paths to allow better postprocessing.
(draw_meta_flat): Use `z3l' as additional point in path to get
better conversion with mf2pt1.
Other minor cleanups.
("3/4 Flat"): Add auxiliary points and modify path to replace
`draw' with `fill'.
("Double Sharp"): Mirror path segments instead of picture elements
to get a single outline.
Modify path to replace `filldraw' with `fill'.