Include <stdint.h>.
(cos_Qcomposition): New variable. (COS_NIL): New macro. (COS_T): New macro. (COS_COMPOSITION): New macro.
(cos_symbol_p): New prototype. (cos_assoc): New prototype. (cos_alist_get): New prototype.
(cos_cons_p): New prototype.
Include <stdlib.h>. (cos_Qnil): New variable. (cos_Qt): New variable. (cos_print_object): New prototype.
(struct COS_Cons_ent): New structure. (COS_Cons): New type. (cos_cons): New prototype. (cos_car): New prototype. (cos_cdr): New prototype.
(cos_string_p): New prototype.
New files.