validation/**.sql: replaced CREATE OR REPLACE VIEW with CREATE VIEW to match pg_dump output for diffing

bugfix: *.sql: public.source_by_shortname(): need to wrap it in a nested SELECT because Postgres incorrectly does not constant-fold (inline) it, leading to a slowdown when it is therefore run many times. this is done using the steps at wiki.vegpath.org/Postgres_queries#wrap-function-call-in-nested-SELECT .

added validation/aggregating/traits/BIEN2_traits/_archive/bien3_validations_traits_complete.sql from Brad's e-mail

validation/aggregating/*/*.sql, schemas/vegbien.sql, lib/runscripts/validations.pg.sql.run, inputs/bien2_traits/validations.sql: added _ to beginning of each view name so the validation views would sort at the top in the datasource's tables list. this will also make the validation result sets easily distinguishable from the data tables.

validation/aggregating/*/*.sql: renamed views to match the current naming scheme in the DB. these files still need to be kept up-to-date because there are some queries that haven't been implemented yet, and therefore exist only in these files, not the DB.

bugfix: validation/aggregating/traits/BIEN2_traits/bien3_validations_traits_original_mysql.VegCore.sql: added util to search_path so that IFNULL would link to util.ifnull()

validation/aggregating/traits/BIEN2_traits/bien3_validations_traits_original_mysql.VegCore.sql: added view names using the steps at wiki.vegpath.org/Aggregating_validations_refactoring#prepend-CREATE-VIEW

validation/aggregating/traits/BIEN2_traits/bien3_validations_traits_original_mysql.VegCore.sql: removed trailing whitespace

schemas/vegbien.sql, validation/aggregating/*/*.sql: renamed public_validation_* to plural public_validations_* since we refer to them as aggregating validation*s*

validation/aggregating/*/*.sql: use "" to preserve case in column aliases, so that they match the input queries