navo obsgen fix (#28)
navo obsgen fix (#28)

* navo obsgen depth

navo obsgen function fix to allow variable depth

* obs gridder depth adjust

* obsgen depth

If depth is none, put obs to the surface layer number instead of zero
depth

* Merge branch 'powellb/master'

# Conflicts:
#	roms/obs.py

* navo fix

Fix depth issue created when gridder changed to layers from zero depth

powellb/seapy,ocefpaf/seapy,dalepartridge/seapy