web/links/index.htm: removed broken favicons

web/links/index.htm: removed broken favicons. this requires using the SQLite Manager Firefox add-on <https://addons.mozilla.org/en-US/firefox/addon/sqlite-manager/?src=search> to manually remove the favicon entries.

lib/Firefox_bookmarks.reformat.csv: formatting fixes: don't put the src attribute of the favicon image on its own line, because it no longer contains long inline image data

lib/Firefox_bookmarks.reformat.csv: favicon image: remove ICON attributes with inline image data, since these are no longer needed for the favicon images and this avoids cluttering up the svn diff

lib/Firefox_bookmarks.reformat.csv: favicon image: use ICON_URI instead of ICON to fetch the favicon directly from the original site. this allows the favicons to be cached separately from the bookmarks page, so that the inline favicon contents don't need to be re-retrieved every time the bookmarks page is updated. this also avoids cluttering up the svn diff.

web/links/index.htm: updated to Firefox bookmarks. added description of the formats supported by PostgreSQL's COPY command and their escape sequences.

bugfix: schemas/vegbien.sql: geoscrub_input_view: only include places whose country is not NULL, because at least the country is required for geoscrubbing

/README.TXT: Schema changes: Reinstall staging tables: added step to run `make schemas/public/install` after the datasources are installed. note that this must be run after the datasources are installed, because views in public depend on some of the datasources.

/README.TXT: Schema changes: Reinstall staging tables: use `make db` instead of mk_db, which includes the required schemas/install command. some datasources use the util schema in their postprocess scripts, so this must be installed before the staging tables.

bugfix: /Makefile: moved schemas/install from install to db so that it is also run whenever the DB is reinstalled. schemas/install is needed by the staging tables reinstallation performed by reinstall_all.