Changeset 2342 for LMDZ5/trunk/libf/misc

Follow-up for a cleaner separation between dynamics and physics:

• "write_field" is called from physics and dynamics but has no dependence on either so it should be in "misc"
• "write_field_phy" is common to all physics, so it goes in "phy_common"
• "init_ssrf_m" and "limit_netcdf" are only used by ce0l, so these should be in "dynlonlat_phylonlat/phylmd"
• "q_sat" is called from physics and dynamics but has no dependence on either so it should be in "misc"

EM