with recursive clock depende ncies.

- add a sectiuon on operators priority
- fix the automatic latex grammar generator (now calles yacc2latex)

also force the -rif in the utils/luciole-rif script when used with
lutin or lus2lic.

Add the modes3x2 exemple of Pascal (its version + a la V6 version).

Fix the doc wrt the merge exemple (the tex was refering to a
non-existant file).

Actually, it was a misunderstanding of mine (R1) ; the behavior was consistent
with the lv6 doc, but not with the v4 behavior...

Indeed, # means "at most 1 among n", not "exactly one among n" as I tought...

nb : do not work for lv4/ec mode

'-' replaced by 'm', '.' by 'd',
(see "correct_num_string" in LicDump.ml)

constants that  are not  on the base  clock, add the  suitable "when"
statement if it was not present  in the source code (the lic (and the
ec/lv4) backend  does not  perform such kind  of clock  inference for
constants.