* scm/output-lib.scm (note-head-style->attachment-coordinates):

* scm/output-lib.scm (note-head-style->attachment-coordinates):
change calling convention of stem-attachment function.

* buildscripts/mf-to-table.py: read and dump WX/WY fields

* mf/feta-autometric.mf: dump WX/WY fields too

* mf/parmesan-heads.mf: idem.

* mf/feta-bolletjes.mf (slash_slope): set WX/WY fields for
attachment coordinates.

* lily/note-head.cc (stem_attachment_coordinate): read stem
attachment from the notehead glyphs WX/WY fields.

* lily/include/font-metric.hh (struct Font_metric): add methods
get_indexed_wxwy (), make a distinction between looking up by
index and ASCII

* mf/feta-bolletjes.mf: rewrite note head MF code.
(test_outlines): make heads more rotund for smaller sizes.