Picat: added subset_sum_rosetta_code.pi scheduling_speakers_optimize.pi pascals_triangle_puzzle.pi non_continous_subsequences.pi lzw_compression.pi levenshtein_distance.pi dutch_national_flag_problem.pi digital_root.pi decision_tables.pi cryptogram.pi, updated: alldifferent_except_0.pi alphametic2.pi count_the_coins.pi euler1.pi