* lily/side-position-interface.cc: remove add_staff_support ()

* lily/side-position-interface.cc: remove add_staff_support ()
Change all callers to use staff-padding.

* lily/auto-beam-engraver.cc (create_beam): opps. Don't use
make_spanner().

* lily/a2-engraver.cc (process_acknowledged_grobs):

* lily/text-engraver.cc: remove scriptHorizontal property.

* lily/side-position-interface.cc (out_of_staff): move contents of
out_of_staff into aligned_side.
remove out_of_staff().

* lily/side-position-interface.cc: add staff-padding support to
Side_position_interface::aligned_side.