vegbien.sql: Added namedplace_update_ancestors and plantname_update_ancestors triggers to populate ancestor cross-links in new namedplace_ancestor and plantname_ancestor tables

sql.py: insert() (and try_insert()): Added optional returning param to provide name of an inserted column (usually pkey) to return

env_password: Print Usage message if run without initial "."

Added bin/stop_imports to stop all running imports

import_all: Print Usage message if was run without initial "."

Renamed import-all to import_all to match convention of using underscores

inputs/CTFS: Added remaining non-data src files

Added CTFS data dictionary inputs/CTFS/src/ctfs-comments_worksheet.xls

import-all: Fixed to display the datasource name in the job name instead of 'make ${input}import &'

import-all: disown each new import process to ignore SIGHUP