Fixes build issues with testing turned on due to not finding R libraries.
Changing the export macro.
Modifying spatio-temporal plugin to properly output multiblock temporal statistics filter.

For the spatio-temporal script creator plugin, we replace the timecompartmentsize
value set in the gui for the filter with the timecompartmentsize value
set in the exporter wizard so that when the script is run that the filter
gets the proper time compartment size.
Merge remote-tracking branch 'github/temporal_parallelism_statistics' into uvcdat-next

* github/temporal_parallelism_statistics:
  Changing the export macro.
Merge remote-tracking branch 'github/temporalstatistics_generator_script' into uvcdat-next

* github/temporalstatistics_generator_script:
  Modifying spatio-temporal plugin to properly output multiblock temporal statistics filter.
Merge remote-tracking branch 'github/link_R_libs_properly' into uvcdat-next

* github/link_R_libs_properly:
  Fixes build issues with testing turned on due to not finding R libraries.