fix: inputs/SALVIAS/salvias_plots.~.clean_up.sql: Delete rows that do not satisfy foreign key constraints: also need to do this for plotObservations, since the refreshed data contains dangling rows for that as well

inputs/SALVIAS/run_: documented *.sql install runtime (3 min), as separate from the full `datasrc_make reinstall` runtime (3.5 min)

inputs/SALVIAS/run_: refresh(): `datasrc_make reinstall`: updated runtime. documented that runtimes are from starscream.

added inputs/SALVIAS/run_, which includes a refresh() target

lib/runscripts/in_datasrc_dir.run: datasrc_make(): use `if remaking ...` instead of accessing $_remake manually, for clarity

bugfix: lib/runscripts/in_datasrc_dir.run: datasrc_make(): use set_make_vars and $_remake as required in lib/sh/make.sh `remaking`

lib/sh/make.sh: remaking alias: documented that you MUST use set_make_vars at the beginning of any function that uses this, so that $_remake is properly set to $remake and not left at its previous value

web/links/index.htm: updated to Firefox bookmarks. git: added instructions to migrate from svn.

web/links/index.htm: updated to Firefox bookmarks. git: added instructions to migrate from svn.

web/links/index.htm: updated to Firefox bookmarks. added instructions for running `svn switch` after moving everything into /trunk/ (for us, use `svn switch --force https://code.nceas.ucsb.edu/code/projects/bien/trunk # runtime: <1 min`).