schemas/util.sql: added mk_source_col(), which uses the schema name instead of the map spreadsheet header to get the datasource name

schemas/util.sql: added table_schema()

added planning/goals/iPlant_BIEN_Proposal_Final.pdf with Mark's e-mail notes in iPlant_BIEN_Proposal_Final.pdf.notes.txt

bugfix: schemas/util.sql: mk_map_table(): add trigger to remove metadata value entries from the map spreadsheet as it's being imported, since these do not correspond to actual columns in the staging table and will produce an error when trying to rename nonexistent columns to them. note that these entries will still need to be included properly in VegBIEN.csv, which will require changes to the VegBIEN.csv make target.

empty inputs/*/import_order.txt: added subdirs in the order they are used by inputs/input.Makefile, by running make on the inputs to auto-populate import_order.txt. import_order.txt is needed by the runscripts to run the right set of subdirs in the right order.

added inputs/.TNRS/grants.sql, with statements to provide SELECT access to bien_read. these statements must be in grants.sql to avoid them being filtered out by pg_dump_limit.

inputs/input.Makefile: added support for separate grants.sql file, which may contain GRANT statements that would normally be filtered out by pg_dump_limit

inputs/input.Makefile: sql/install: added $debug option to run the *.sql import verbosely, to display which statements are being run. this should only be used for SQL files that use COPY FROM to import data, to avoid echoing pages of insert statements.

inputs/input.Makefile: keep $(sortFile) up-to-date: use sort_file_updated=1 flag to indicate that import_order.txt has already been checked, so that recursive invocations of make don't need to recheck it. also use this flag instead of an explicit $(MAKECMDGOALS) list to prevent the $(sortFile) check from being infinite-recursively reinvoked when input.Makefile is read as part of the $(sortFile) check itself.

inputs/input.Makefile: keep import_order.txt up-to-date by running `make $(sortFile)` each time make is run. this ensures that new datasources always have import_order.txt populated when make is first run. eventually, $(tables) can be always set to $(allTables) so that this auto-updating can also be used to ensure that new subdirs added by the user always make it into import_order.txt (so that they will be included in the subdirs that get remade, etc.). import_order.txt is primarily for specifying the order of the subdirs, but some datasources also use it to filter out subdirs, so it can't yet be always updated to include the full list of subdirs. however, the filter-out usage should no longer be necessary after the switch to new-style import.