Use same dynamic array pattern everywhere (with macro FATSO_ARRAY).
Updated .gitignore.
Rewrote fatso_lower_bound_cmp in terms of indices rather than pointer
arithmetic, and added break for exact equality.
Renamed fatso_insert_ordered to fatso_multiset_insert, added fatso_set_insert.
Dependency resolution API.
Output value of fatso_lower_bound_cmp on empty input.