inputs/IRMNG/map.csv: updated to scrubbed output names from */map.csv (/map.csv does not currently get scrubbed)

bugfix: inputs/IRMNG/species_homonyms/header.csv, map.csv: reset input columns to DSV (delim-separated values) header. they had gotten changed to the output names in running map.csv with remake=1, causing it to be remade from the (renamed) staging tables.

inputs/input.Makefile: $(_svnFilesGlob): added *Makefile

/README.TXT: `make inputs/{upload,download}`: first run with test=1 to see what the diffs will be

added inputs/IRMNG/, including runscripts to download the names. this is now the 2nd datasource after GBIF to use runscripts, and the 3rd after FIA/GBIF to use new-style import.

inputs/input.Makefile: $(_svnFilesGlob): added *run (runscripts)

lib/runscripts/table.run: import(): also run remake_VegBIEN_mappings() to accept the test output. this function was previously unused, but was left in for future use when lib/import.sh was translated to lib/runscripts/table.run (it was used in its import.sh form in inputs/FIA/occurrence_all/import).

bugfix: lib/runscripts/table.run: remake_VegBIEN_mappings(): need to change to $top_dir before running `rm header.csv map.csv`

lib/sh/util.sh: added in_top_dir()

lib/runscripts/table.run: remake_VegBIEN_mappings(): only remake header.csv, map.csv if this target is being run directly, to avoid needing to remake them every time. for tables that are views, this instead requires them to be explicitly remade when the view columns change.