Rework scan_coho_interval_list to fix union_of_coho_intervals_minus_union_of_coho_intervals testcase
Fix interval_minus_union_of_intervals testcase using new function proper_interval_list_from_scan
Use proper_interval_list_from_scan in reduce_with_dense_moves to simplify code.
Merge remote-tracking branch 'origin/discontinuous_functions'
Many updates to the compendium of extreme functions