Several major changes. In particular, gh_vector() now resembles
(vector ...) (with a caveat -- see manual), and gh_make_vector() now
-exists and behaves like (make-vector ...). gh_vref() and gh_vset()
-have been renamed gh_vector_set() and gh_vector_ref(). Some missing
+exists and behaves like (make-vector ...). gh_vset() and gh_vref()
+have been renamed gh_vector_set_x() and gh_vector_ref(). Some missing
vector-related gh_ functions have been implemented.
** pair and list routines