Add taub_mag to output_medium and _big. See #266.
Close #263.
Document the -atmosphere_searise_greenland_file option.
I will submit this tiny thing on hydrology soon.
Get rid of a -Wshadow warning

(and related cosmetic changes)
Get rid of one more -Wshadow warning.
Move all public(*) symbols into the "pism" namespace. See #188.

(*) and some private ones, too, probably.

Also: clean up the IceModelVec API a little bit.
Fix compilation errors on beauregard.
Warn for negative ice thickness in part_redist.

This is meant as a temporary fix to to help with #267. The warning will be followed by fatal error when PISM next check for negative ice thickness.
Address #267.

@jsegu: I think this is all we need to fix this bug. Do you mind
re-doing your test run?
Merge branch 'dev' into blatter
Add "namespace pism" to the Blatter code.