card_node_create() now malloc()s Cards
Fix fill_linked_hand() compatibility with previous commit.
Both games no longer need to retain hands.
Fix fdtion_top memory allocation consistency.
Split cardutil's file methods into fileops.c
Adapt fopen_hand() and split_hand() to return arrays of pointers.
Make solitgame use new fopen_hand(). Fix foundation card-saving error.
Fix merge conflict and remove debugging stuff.