bugfix: schemas/Makefile: `%/install: vegbien.sql`: need -e before each s/// expression

schemas/Makefile: `%/install: vegbien.sql`: create a custom _validation schema for *each public schema, rather than one for the most recently-created public schema. this allows validations to continue to be run against a previous version of the DB while a new version is being imported.

validation/aggregating/traits/bien3_validations_traits_bien3.sql: include only records from the bien2_traits datasource, to ensure that the scope of all queries is limited to the datasource

validation/aggregating/*/*.sql (the output queries): added `SET search_path TO validation`

validation/aggregating/specimens/qualitative_validations_specimens.sql: added CREATE VIEW prefixes using the steps at wiki.vegpath.org/Aggregating_validations_refactoring#prepend-CREATE-VIEW

validation/aggregating/traits/bien3_validations_traits_bien3.sql: added CREATE VIEW prefixes using the steps at wiki.vegpath.org/Aggregating_validations_refactoring#prepend-CREATE-VIEW

validation/aggregating/plots/bien3_validations_salvias_vegbien.sql: added CREATE VIEW prefixes using the steps at wiki.vegpath.org/Aggregating_validations_refactoring#prepend-CREATE-VIEW

validation/aggregating/plots/bien3_validations_salvias_vegbien.sql: added CREATE VIEW prefixes using the steps at wiki.vegpath.org/Aggregating_validations_refactoring#prepend-CREATE-VIEW

added validation/aggregating/specimens/qualitative_validations_specimens.sql template, with query descriptions from NY/qualitative_validations_source_db_NYBG.sql

validation/**: removed old versions of by=-tagged files. these were not renamed in the last commit because there were newer versions that they collided with. note that because , sorts before . , the newer version (with more ",name@inst" tags) was correctly renamed instead of the older version.