these two refs have now appeared in print
beauregard has a really pedantic compiler:

/home/bueler/pism/src/base/util/io/PISMNC4_HDF5.cc: In member function ‘virtual int pism::NC4_HDF5::create_impl(const string&)’:
/home/bueler/pism/src/base/util/io/PISMNC4_HDF5.cc:485:19: warning: converting to non-pointer type ‘MPI_Info {aka int}’ from NULL [-Wconversion-null]
   MPI_Info info = NULL;
                   ^
Realized that we don't need IceModelVec3BTU.
Add m_ prefix to BedThermalUnit data members.
Fix a bug in -ocean ...,delta_SMB.
Made case of file match others.  (Someone has been using a case-insensitive OS again ...)
Fix Python wrapper docs (in dev).

Sphinx failed to build ssa_tao.py because it does not really import
petsc4py and so the code checking the PETSc version can't do its job.
Avoid a possible but harmless division by zero (in dev).

(This is in PISM.)
Silence some pedantic compiler warnings.
Remove automatic vertical grid extension.

The automatic vertical grid extension mechanism is getting in the way of
code improvements I'm working on. It would be a lot better to stop the
run (as if the TERM signal was raised) and let the user re-start with
new grid settings.
Merge branch 'dev' into fevor