lib/sql_io.py: null_strs: made it customizable from an env var, since the same list of null_strs doesn't work for all datasources (see #957)

inputs/Cyrille_traits/Makefile: set custom $(null_strs) which handles "NA"

inputs/input.Makefile: pass make var $(null_strs) to invoked commands so it can be used by lib/sql_io.py

fix: *Makefile: changed line endings to \n so that `patch` can work with pasted input. use `svn di --extensions --ignore-eol-style` to verify no diff.

lib/sql_io.py: null_strs: made it customizable from an env var, since the same list of null_strs doesn't work for all datasources (see #957)

bugfix: web/links/index.htm: updated to Firefox bookmarks: Mac: automatic restart on power loss: also need to disable the UPSShutdownAtLevel/UPSShutdownAtMinutesLeft functions because an orderly shutdown prevents the computer from auto-restarting on power loss. Bookmarks Toolbar: reordered links to put those most relevant to VegBIEN users first.

bugfix: config/dev_machine/com.apple.PowerManagement.plist: disable the UPSShutdownAtLevel/UPSShutdownAtMinutesLeft functions because an orderly shutdown prevents the computer from auto-restarting on power loss

bugfix: /README.TXT: Datasource setup: For MS Access databases: also need to comment out `CREATE DATABASE` because pg_dump_limit is only applied to data.sql (due to requirements of the TNRS datasource)

added inputs/CVS/_src/cvs-eep-archive-2014-10-07-correctedCVSData.{data,schema}.sql.ini

bugfix: inputs/CVS/_src/{data,schema}.sql.ini: sourcefilename: this needs to be on the VM's own HD to avoid crashing MSAccess to PostgreSQL. destinationdatabase: added this back since it is fine to leave this blank.