Initial commit
Initial set-up of snowdrift library
Full day's work.  Test programs separated out, work.  Ready to interface with Python
Python interface for snowdrift regridding.  Have not yet tried to compile, but is generally complete.
Python interface works.
Grid polygons for full realized grid now written to overlap file.
Work in progres...
Got a lot of stuff working, downgridding a sample function over Greenland.
Switched to using GALAHAD EQP_SOLVE for problems with equality constratints only.  It is MUCH faster.
Followed Nick Goulds suggestions, used Galahads EQP instead of QP, it sped things up a whole lot.
First regridding of data from SeaRISE
Work in progress... Getting snowdrift regridder w/ height classes and land masks in place.
More work.  Fully templatized SparseMatrix.  Working through the code...
Oops, forgot to add smain/ to repository!
New Snowdrift compiles, have not yet tested.
Debugging initial compile...
Fixed many bugs.  Successful HNTR up-gridding and down-gridding.  Still crashes when using QP smoothing on downgridding.
Added height-classified rasterizing.  Compiles, not yet tested.
Added snowdrift_test3.py, the basic regridding test on xy grids
Searise demos without height classes work.