Improving split and reorganizing
- spot/twaalgos/synthesis.cc, spot/twaalgos/synthesis.hh: New files regrouping the functionnalities split and apply_strategy for synthesis
- python/spot/impl.i, spot/twaalgos/Makefile.am: Add them.
- spot/twaalgos/split.cc, spot/twaalgos/split.hh: No longer contains the splits necessary for for synthesis, moved to spot/twaalgos/synthesis.cc, spot/twaalgos/split.hh Split is now faster and reduces the number of intermediate states, reducing the overall size of the arena
- spot/misc/game.cc, spot/misc/game.hh: Renaming propagate_players to alternate_players.
- tests/core/ltlsynt.test, tests/python/split.py: Update tests.
- bin/ltlsynt.cc: Adjust to new split. Swap order of split and to_parity for lar.