options, corrected docs for evaluator trap options.
* scheme-evaluation.texi (Scheme Read): New docs for read-options,
read-enable, read-disable and read-set! and cross references to
option nodes.
(Evaluator Options): New docs for eval-options, eval-enable,
eval-disable and eval-set!, traps, trap-enable, trap-disable and
trap-set! and cross references to option nodes.
(Evaluator Behaviour): Renamed node from `Evaluator options' to
avoid name clash.
* scheme-io.texi (String Ports): Added docs for SRFI-6 procedures.
(Void Ports): Corrected introductory comment.
procedures.
(Integer Operations): Added documentation.
(Comparison): Added documentation.
(Complex): Added documentation.
(Symbols and Variables): Comment out `builtin-bindings', which is
removed according to NEWS.
(Pairs): Added documentation.
* scheme-io.texi: Added R5RS index entries for all R5RS
procedures.
(File Ports): New docs for `call-with-input-file',
`call-with-output-file', `with-input-from-file',
`with-output-to-file', `with-error-to-file'.
* scheme-control.texi, scheme-utility.texi,
* scheme-procedures.texi: Added R5RS index entries for all R5RS
procedures.
* scheme-evaluation.texi (Fly Evaluation): Added documentation for
`apply'. Added R5RS index entries for all R5RS procedures.
* scheme-data.texi: Added R5RS index entries for all R5RS
procedures. Removed R5RS index entries for `ass{q,v,occ}-set!'.
Removed explicit entries into the function entries. They are
automagic.
(Vectors): Added documentation for `make-vector', `vector-ref' and
`vector-set!'.
