(indices_to_pos, scm_array_handle_pos): Renamed

(indices_to_pos, scm_array_handle_pos): Renamed
former to latter and made public.  Changed all uses.
(scm_i_make_ra): Made public, changed tag param to enclosed flag.
(scm_make_ra): Deprecated, changed all uses to scm_i_make_ra.
(scm_i_shap2ra): New internal version of scm_shap2ra.
(scm_shap2ra): Deprecated, changed all uses to scm_i_shap2ra.
(scm_i_ra_set_contp): New internal version of scm_ra_set_contp.
(scm_ra_set_contp): Deprecated, changed all uses to
scm_i_ra_set_contp.
(scm_cvref, scm_aind, scm_raprin1): Deprecated.