Renamed InvSSATikhonov to more abstract TaoTikhonovProblem, added some documentation, and removed explicit relationship with InvSSAForwardProblem.  TaoTikhonovProblem can then be used for alternative inverse problems (e.g. hardness-> SSA velocity).  A Tauc->SSA inversion problem is now defined in SSATaucTikhonovProblem, a subclass of TaoTikhonovProblem.
remove old hydrology commentary page ... totally irrelevant now
add 4 beautiful new papers from cambridge
PeglerListerWorster2012 contains a similarity solution which makes a great test of -part_grid and -cfbc, so that's what test Q is
- updated EISMINT Greenland runs, at least the examples run now
- added missing -skip_max to SeaRISE Greenland experiments
Merge branch 'dev' of https://github.com/pism/pism into dev
Documentation of TaoTikhonovProblem.
Test Q largely set up.  Need to study its results.
The script is now better-suited for verification, but the PISM run is not so good.  Need to check on the ice hardness.
Documentation of InvSSAForwardProblem.
Organize inverse sources: put Functionals in a common directory.
Organize inverse sources: common prefix for inverse problem classes (round 1)
Organize inverse sources: common prefix for inverse problem classes (round 2)
A copy of siple now lives in PISM.
Documentation of IP_SSATaucTaoTikhonovProblem{LCL}, IPTaucParameterization.
Changes based on email from Sayag.  Esp: flux known, radius of pipe better known.
Switch optparse --> argparse.  Read data file.  Add data to image if present.
Added inverse/functionals to doxygen search path
Merge branch 'dev' of https://github.com/pism/pism into dev
Removed vestigial class FEEvaluator