Yet another hydrology ref.
I am confused by the two different ways the current time was turned into a string.  One way is used in iMreport.cc (for stdout summary line) and one in iMutil.cc (for -USR1 file name).  I chose the latter because it works correctly for current SeaRISE-Greenland script.
I looked at the installation manual and found the section and subsection headings confusing.  I changed them some.  I am pretty sure this is an improvement, but further improvements are certainly possible.
- started updating Storglaciaren 3D model. This is work in progress. The idea is to calculate a reasonable surface velocity field and calculate the center flowline. This can then be compared to Christian Kienholz's centerline algorithm.
- Added a minimal example for calculating the relaxed basal topography of Greenland using the Lingle-Clark bed deformation model. See Bamber et al (Science, 2013) for a motivation. Maybe there are more efficient ways, but it's working.
Works for me.  Did very minor edits, mostly in README.
- using very negative climatic mass balance instead of force-to-thickness
I think this should take care of #168.

(There was a bug in the code that affected the interpretation of time
bounds in a file specified using the -time_file option.)
Stop with an error message if someone tries to build PISM using old PETSc.

Here "old" means 3.2 and older.
Fixing bad CMake scripting done earlier today (see 1bc59d6).
Code cleanup (removes remains of the code supporting PETSc 3.2). See #156.
Regression tests using "extra execs" are disabled by default. See #159.

The tests are still there and *are* used if Pism_BUILD_EXTRA_EXECS is
set to "ON" or if Pism_BUILD_TYPE is set to "Debug" (which implies
Pism_BUILD_EXTRA_EXECS == "ON").
Code cleanup (very minor).
Cleaning up Maxima code documenting the SSAFD discretization.

I need this to fully understand what geometric configurations cause
"zero pivot" errors that are addressed by the "nose removal" code.
Tell the SSAFD KSP solver to use non-zero initial guesses. (Port to 0.5.)

Better late than never.
Merge dev.  Fix trivial conflict in PISMMohrCoulombYieldStress.cc relating to assert.