Revision 25

Simplified "etat0_lim.sh" and "gcm.sh" because the full versions
depended on personal arrangements for directories and machines.

Translated included files into modules. Encapsulated procedures into modules.

Moved variables from module "comgeom" to local variables of
"inigeom". Deleted some unused variables in "comgeom".

Moved variable "day_ini" from module "temps" to module "dynetat0_m".

Removed useless test on variable "time" and useless "close" statement
in procedure "leapfrog".

Removed useless call to "inigeom" in procedure "limit".