schemas/vegbien.sql: added new ~type tables

fix: lib/phpPgAdmin.login.php.diff: "For user public_, leave password blank" instruction: moved this to right under the Password field and increased the font size so people would be more likely to see it

/Makefile: added separate phppgadmin-Linux target to avoid needing to run the entire postgres-Linux target whenever http://vegbiendev.nceas.ucsb.edu/phppgadmin/ goes down (after some system updates)

schemas/vegbien.sql: rm_all_queries(schema): documented this function's unexpected behavior when schema = public_validations (it removes in all schemas, not just public_validations). this is because this uses rm_query_view().

fix: schemas/vegbien.sql: use plot (which includes only outer plots) instead of location, to match the input queries

schemas/vegbien.sql: rm_query_group(): support removing all validations as well as just those with a particular group prefix (and renamed to rm_output_queries())

fix: schemas/vegbien.sql: public_validations: schema comment: removed incorrect "" in `SET search_path = "public_validations", pg_catalog;` now that they are no longer auto-added

bugfix: schemas/Makefile: `%/install: vegbien.sql`: don't enclose public_validations in "" because this causes a comment that says to search for `SET search_path = public_validations, pg_catalog;` to become mangled

schemas/vegbien.sql: synced with DB, which reorders ~type tables

fix: schemas/Makefile: moved comment about publishing a schema to %/publish