* __scm.h eq.c, eval.c, gc.c, hc.h, gh_data, hash.c, numbers.c,

* __scm.h eq.c, eval.c, gc.c, hc.h, gh_data, hash.c, numbers.c,
numbers.h, objects.c, ramap.c, random.c, unif.c, unif.h: Extensive
rewrite of handling of real and complex numbers.
(SCM_FLOATS, SCM_SINGLES): These #ifdef conditionals have been
removed along with the support for floats.  (Float vectors are
still supported.)

* numbers.c (scm_floprint, scm_floequal): Removed.
(scm_print_real, scm_print_complex, scm_real_equalp,
scm_complex_equalp): New functions.

* numbers.c (scm_makdbl): no malloc'ing needed, so the
{DEFER,ALLOW}_INTS thing removed.