* mf/feta-bolletjes.mf: make hole in half note little

* mf/feta-bolletjes.mf: make hole in half note little
smaller for stem attachment.

* lily/stem.cc (brew_molecule): tweaks for new flag layout.

* mf/feta-banier.mf: don't draw stem with flag, just small square
attachment.

* mf/feta-bolletjes.mf (slash_slope): remove ledger ending

* mf/feta-banier.mf: remove upstem/downstem characters.

* mf/feta-params.mf (stafflines): stems are 1.3 SLT.

* ly/params-init.ly (blotdiameter): set blotdiameter to 2/3 of
stafflinethickness (in the default)

* lily/stem.cc (brew_molecule): use round_filled_box for stem.

* lily/stem.cc: remove #'up-to-staff ; use #'stem-end-position for
forcing up to staff.  remove #'support-head property
(brew_molecule): small cleanup.
(flag): remove #'grace property.