- guf_stack, guf_queue, guf_ringbuf
- guf_rand etc.: move guf_fn_keywors out of header guard? (-> no, add a GUF_WITHOUT_TYPES)

- unicode normalisation
- fix 32-bit dict (and add 32/64 bit defs in common.h)
- guf_dict: allow manual resize (and possibly resize if load fac gets to high after erase)