Revision 85

Removed option to guide surface pressure because it was not
functional: psrea1 was not defined in procedure guide. Removed local
variables psrea1 and psrea2 of procedure guide. ps becomes an
"intent(in)" argument in guide. Removed case guide_p in guide. Removed
variable guide_p of module conf_guide_m. Removed case guide_p and
argument ps in read_reanalyse. Removed case guide_p and argument ps in
reanalyse2nat.