* lily/tie-formatting-problem.cc (score_ties): new function

* lily/tie-formatting-problem.cc (score_ties): new function
(get_variations): new function. Try flipping dirs for collisions.
(generate_optimal_chord_configuration): new function. 1-opt search
for better configuration.

* lily/tie-formatting-problem.cc (score_ties_aptitude): new function.
(score_ties_configuration): new function.
(generate_ties_configuration): new function.
(generate_base_chord_configuration): new function.
(set_ties_config_standard_directions): Move body from tie-column-format.cc
(set_manual_tie_configuration): Move body from tie-column-format.cc

* lily/tie-formatting-problem.cc (score_configuration): score
tie/dot collisions.