Added lib/import.sh, for use by new, simpler import scripts used by FIA. Note that for now, input.Makefile is still used to create map.csv.

inputs/input.Makefile: Moved postprocess.sql from $(exportHeader) to %/install because that is not part of the $(exportHeader) functionality. Added %/header.csv and use it in $(exportHeader).

inputs/input.Makefile: $(catSrcs): Fixed bug where need to use $(nonHeaderSrcs) instead of $(srcs) to exclude header.csv

schemas/functions.sql: map: Added additional columns that are present in the standard map spreadsheet format (filter, notes). These columns are necessary to make COPY FROM work, because it requires the # of columns to be the same in the input data and the output table.

inputs/input.Makefile: Moved $(cleanup) from $(exportHeader) to %/install because this is not part of exportHeader's functionality

inputs/input.Makefile: $(mkSrcMap): Use header.csv instead of the header of the CSVs, so that the column list in the map spreadsheet matches the actual DB table

inputs/input.Makefile: %.sql/run: Change to the directory the file is located in, so that includes (\i) are relative to the file, rather than relative to whatever happens to be the current directory

inputs/input.Makefile: %/install: Always generate a header.csv, even for CSV inputs with their own header. This will include the actual column names in the staging table, which may differ from their names in the CSVs (e.g. the addition of row_num). Note that header.csv is not included in the CSVs list itself, and will not override the header or dialect in them.

schemas/functions.sql: Added set_col_names()

schemas/functions.sql: rename_if_exists(): Also ignore duplicate_column exceptions, which are generated when a column is renamed to itself (as well as when two columns are renamed to the same place)