inputs/Madidi/0.plots/map.csv: Added [Veg+] to root to enable auto-mapping

inputs/import.stats.xls: Updated with stats from latest import

inputs/SALVIAS*/1.organisms/map.csv: Map directly to locationID, plotName instead of parentLocationID, parentPlotName because these terms now map correctly to the parent location when a subplot column exists

mappings/VegCore-VegBIEN.csv: plotName -> /location/authorlocationcode mapping: When subplot is provided, remove this mapping using _if ... _exists instead of _alt so that a NULL subplot value will not cause the parent plot's name to be used for the subplot name

input.Makefile: Testing: $(runTest): Remove outputs of successful tests to reduce clutter

input.Makefile: Testing: %/test.staging.xml: Don't create test.staging.xml at all for non-flat-file inputs, because it is not needed (diff does not run in this case)

mappings/VegCore-VegBIEN.csv: Fixed bug where "if subplot" conditions would evaluate to true only if the subplot was NOT NULL, when they should actually evaluate to true if the datasource specified any subplot column, nullable or not

xml_func.py: simplify(): Removed no longer needed hardcoded _if simplifying code now that there is an _if() simplifying function

db_xml.py: input_col_prefix: Use value of xml_func.var_name_prefix, which is now the place where this value is configured

db_xml.py: Moved input_col_prefix above the put() function that uses it