Trying to get #16 taken care of. Compiles but does not work.
PSVerification is a success.

All regression test using SIA verification tests pass.
Implement PS_EISMINTII; remove PSDummy.
Update stored drift in the hydrology regression test.
Clobber a valgrind error in PISMConstantYieldStress.
Sort out units of reported fluxes.

Also: fix a bug in IceModel::do_calving(): vHref could be used even when
"part_grid" is not active, leading to a crash.
Switching PISMOceanModel to [kg m-2 s-1]. Work in progress.
Work on converting ocean models to new mass flux units.
Change glaciological units, too.
Fix units in ocean models...

... and elsewhere. Updated boundary model tests pass. Also update units
in the forcing manual and fix variable attributes in surface models.

All atmosphere models still use "m / s ice equivalent" as precipitation
units (for convenience). The goal of #16 is to make it possible to do
coupling without matching ice densities, not get rid of ice density in
all "boundary models".

I need to take one more look at all this and then I can close #16.
Minor fix in IceModelVec2S::put_on_proc0().
Add a compile-time option to support clang on OS X 10.9.

Set Pism_USE_TR1 to "ON" if your compiler provides C++ shared pointers
in the std::tr1 namespace and you use "#include <tr1/memory>".

Set Pism_USE_TR1 to "OFF" if you compiler *does not* provide shared
pointers in the std::tr1 namespace (i.e. they are in std) and you
use "#include <memory>".

"ON" is the default, to support older compilers and because some newer
compilers support both "#include <memory>" and "#include <tr1/memory>".
Merge branch 'issue-16' into dev

All tests seem to pass.