…make it more efficient.

…ince its declared as const. The GNU compiler on seneca errors out when constants are included in the shared list while the GNU compiler on my Mac laptop doesn't complain.

… object for each field. Still more work to do to reduce memory usage and also apply OpenMP to the ShapeData::select() function.

…() to exactly reproduce existing results. There were some subtle diffs in the handling of missing data and points off the grid.

…ikely a way to make the memory usage for efficient but it'll require a tweak to the logic.

…ld rather than the individual object fields. And compute pair intersection, union, and sym diff counts from the split field rather than the object fields. This avoid allocating memory for many, many copies of the input grid, which can be quite large depending on the resolution.

…ory allocation for ShapeData objects.

…were computing NMEP outputs. That was removed from ensemble-stat in MET version 11.1 but the OpenMP setup remained there. This removes it from ensemble-stat and updates the documentation to accurately indicate that OpenMP currently applies to gen-ens-prod, grid-stat, and now mode.

…hould be faster and use much less memory.

…ions to be more efficient by accessing the vector of data rather than the slower get(x,y) data accessor function.

…efine their log messages

…bosity level to avoid unnecessary loops through the data. Note that all calls to the logger would actually create the log message and the logger decides whether or not to print it. Wrapping expensive debugging log messages in vebosity level check is more efficient.

… diff a bit more efficient by accessing the data() array directly rather than range-checking with the data(x,y) accessor function.