Revision 175

Added argument itau_phy to ini_histins, phyetat0, phytrac and
phyredem0. Removed variable itau_phy of module temps. Avoiding side
effect in etat0 and phyetat0. The procedures ini_histins, phyetat0,
phytrac and phyredem0 are all called by physiq so there is no
cascading variable penalty.

In procedure inifilr, made the condition on colat0 weaker to allow for
rounding error.

Removed arguments flux_o, flux_g and t_slab of clmain, flux_o and
flux_g of clqh and interfsurf_hq, tslab and seaice of phyetat0 and
phyredem. NetCDF variables TSLAB and SEAICE no longer in
restartphy.nc. All these variables were related to the not-implemented
slab ocean. seaice and tslab were just set to 0 in phyetat0 and never
used nor changed. flux_o and flux_g were computed in clmain but never
used in physiq.

Removed argument swnet of clqh. Was used only to compute a local
variable, swdown, which was not used.