Changes

Updates to pyplotgen to include LASSO cases.  Currently the WRF benchmark file path is not going to be generally valid.  We will probably want to add the WRF-LASSO benchmark files to the benchmark repo, but they will need some additional processing to get rid of large 3D variables that we don't need, or possibly add some additional variables that we want.

See https://github.com/larson-group/wrf/issues/104.

Some updates to the paths for the WRF-LASSO benchmark files, and some minor updates so that a few more variables will show up from both the WRF-CLUBB runs and the WRF-LASSO benchmark runs.

Adding wpuiui to VariableGroupWs.py